[C++ docs] Several fixes, improvements, additions, and general cleanup

- Sort documentation into groups (aka. modules)

- Add DataRenderer, BinaryView, InstructionTextToken, Others docs

- Fixes stylesheet for documentation website

- New 'Deprecated' section listing deprecated items

- Re-add 'Files' listing

- Add a 'Main page' and restructure the navbar

5 files changed, 46 insertions, 19 deletions

diff --git a/api-docs/cppdocs/Doxyfile b/api-docs/cppdocs/Doxyfile
index 72a82539..244c3163 100644
--- a/api-docs/cppdocs/Doxyfile
+++ b/api-docs/cppdocs/Doxyfile
@@ -2147,7 +2147,7 @@ INCLUDE_FILE_PATTERNS  =
 # recursively expanded use the := operator instead of the = operator.
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
-PREDEFINED             =
+PREDEFINED             = DOXYGEN_INCLUDE_MAINPAGE
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
 # tag can be used to specify a list of macro names that should be expanded. The
diff --git a/api-docs/cppdocs/DoxygenLayout.xml b/api-docs/cppdocs/DoxygenLayout.xml
index f946e233..73a7bfdb 100644
--- a/api-docs/cppdocs/DoxygenLayout.xml
+++ b/api-docs/cppdocs/DoxygenLayout.xml
@@ -2,7 +2,7 @@
   <!-- Generated by doxygen 1.8.20 -->
   <!-- Navigation index tabs for HTML output -->
   <navindex>
-    <tab type="mainpage" visible="no" title="Binary Ninja API"/>
+    <tab type="mainpage" visible="yes" title="Binary Ninja API"/>
     <tab type="pages" visible="yes" title="Binary Ninja API" intro=""/>
     <tab type="modules" visible="yes" title="" intro=""/>
     <tab type="namespacelist" visible="yes" title="Namespaces" intro=""/>
@@ -21,12 +21,16 @@
       <tab type="exceptionindex" visible="$ALPHABETICAL_INDEX" title=""/> 
       <tab type="exceptionhierarchy" visible="yes" title="" intro=""/>
     </tab>
-    <tab type="examples" visible="yes" title="" intro=""/>  
+    <tab type="examples" visible="yes" title="" intro=""/>
+    <tab type="files" visible="yes" title="">
+      <tab type="filelist" visible="yes" title="" intro=""/>
+      <tab type="globals" visible="yes" title="" intro=""/>
+    </tab>
   </navindex>
 
   <!-- Layout definition for a class page -->
   <class>
-    <briefdescription visible="no"/>
+    <briefdescription visible="yes"/>
     <detaileddescription title=""/>
     <includes visible="$SHOW_INCLUDE_FILES"/>
     <!-- <inheritancegraph visible="$CLASS_GRAPH"/> -->
@@ -153,7 +157,7 @@
 
   <!-- Layout definition for a group page -->
   <group>
-    <briefdescription visible="no"/>
+    <briefdescription visible="yes"/>
     <detaileddescription title=""/>
     <groupgraph visible="$GROUP_GRAPHS"/>
     <memberdecl>
diff --git a/api-docs/cppdocs/README.md b/api-docs/cppdocs/README.md
index 9a857d17..56412839 100644
--- a/api-docs/cppdocs/README.md
+++ b/api-docs/cppdocs/README.md
@@ -1,8 +1,8 @@
 # CPP Docs
 
-We are currently experimenting with two different document generation systems. You'll see artifacts for both of them in this directory. Currently, the documentation available [online](https://api.binary.ninja/cpp) uses [Doxygen](https://www.doxygen.nl/index.html) but we plan eventually to move to [Breathe](https://breathe.readthedocs.io/en/latest/) / [Sphinx](https://www.sphinx-doc.org/en/master/).
+We currently use `doxygen` for our C++ documentation generation.
 
-## Doxygen
+> Note: Using anything newer than doxygen 1.9.4 will cause minor issues with the website whenever the selected theme conflicts with the OS/browser light/dark mode selection.
 
 Generating documentation with Doxygen couldn't be simpler. Just install it and run:
 
@@ -12,13 +12,13 @@ $ doxygen
 
 From this directory. The output will be stored in `html/`
 
+## Installing doxygen
 
-## Breathe/Sphinx
+The theme for our documentation works best with doxygen 1.9.0 - 1.9.4
 
-The requirements are already described in our [documentation](https://docs.binary.ninja/dev/documentation.html). Instead, however simply navigate to this directory and use:
+### macOS (Homebrew)
 
 ```
-sphinx-build -b html . html/
+wget https://raw.githubusercontent.com/Homebrew/homebrew-core/41828ee36b96e35b63b2a4c8cfc2df2c3728944a/Formula/doxygen.rb`
+brew install ./doxygen.rb
 ```
-
-Note that Sphinx will take significantly longer due to some performance issues with breathe and doxygen generated XML. This is the main reason this is not our primary workflow.
diff --git a/api-docs/cppdocs/custom.css b/api-docs/cppdocs/custom.css
index e977a5b7..11997bbe 100644
--- a/api-docs/cppdocs/custom.css
+++ b/api-docs/cppdocs/custom.css
@@ -43,13 +43,8 @@ html {
     --primary-color: #c74433!important;
     --primary-dark-color: #d0584d !important;;
     --primary-light-color: #a2382a !important;;
-    --side-nav-background: #252628 !important;
-    --side-nav-foreground: #ffffff !important;
 }
 
-div#projectname {
-    color: white;
-}
 .paramname {
     color: var(--primary-light-color);
 }
@@ -72,6 +67,34 @@ input#MSearchField {
     top: -1px;
 }
 
+/* Replicating an "undecorated root node" */
+
+.children_ul a.index\.html {
+    display: initial !important;
+}
+
+a.index\.html {
+    display: none;
+}
+
+
+#nav-tree-contents > ul > li > .item {
+    height: 0px;
+}
+
+/* --- */
+
+/* Move the "Deprecated Items" item to the end of the list. */
+#nav-tree-contents > ul > li > ul.children_ul {
+    margin: 0px;
+    padding: 0px;
+    display: flex!important;
+    flex-direction: column!important;
+}
+#nav-tree-contents > ul > li > ul > li:nth-of-type(2) {
+    order: 9999999;
+}
+
 /* Basic Mobile functionality fixes */
 @media screen and (max-width: 767px) {
     div#top {
diff --git a/api-docs/cppdocs/header.html b/api-docs/cppdocs/header.html
index 7d2534eb..cf41aa50 100644
--- a/api-docs/cppdocs/header.html
+++ b/api-docs/cppdocs/header.html
@@ -45,8 +45,8 @@ $extrastylesheet
   <!--END PROJECT_LOGO-->
   <!--BEGIN PROJECT_NAME-->
   <td id="projectalign">
-   <div id="projectname">Binary Ninja C++ API<!--BEGIN PROJECT_NUMBER--><span id="projectnumber">&#160;$projectnumber</span><!--END PROJECT_NUMBER-->
-   </div>
+   <div id="projectname"><a href="$relpath^index.html">Binary Ninja C++ API<!--BEGIN PROJECT_NUMBER--><span id="projectnumber">&#160;$projectnumber</span><!--END PROJECT_NUMBER-->
+   </a></div>
   </td>
   <!--END PROJECT_NAME-->
   <!--BEGIN !PROJECT_NAME-->