Port Documentation to MKDocs

This was a project to port the documentation to MKDocs, so we would not need to add Swift as a dependency.
Overall, the port was very straightforward as the documentation did not have any major custom Markdown.

A few of the nice features I found:

* Worked perfectly across Windows/Mac/Linux (including auto reload on content change)
* Searching content inside documents was easier
* More customizable
* Nice outline of content on right side of page
* One simple command to test/deploy mkdocs serve or mkdocs build
   - I was handling a lot of the complexity in a Makefile before.

Author: stwrt

.gitignore

@@ -1,10 +1,3 @@
 .DS_Store
-/.build
-/Packages
-/*.xcodeproj
-xcuserdata/
-DerivedData/
-.swiftpm/config/registries.json
-.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
-.netrc
-/docs/*
+.vscode/*
+/site/*

.swiftpm/xcode/package.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -4,41 +4,29 @@ This repository contains the documentation for the WebKit Project.
 
 ## Build Documentation
 
-### Preview Documentation Locally
-
-This will bring up a local web server, so you can view the documentation locally.
+### Install Dependencies
 
+```python
+pip3 install mkdocs-material
 ```
-make preview
-```
-
-### DocC Archive (Xcode)
-
-Generate a DocC Archive that will be automatically imported into Xcode's documentation.
 
-```
-make docc
-```
-
-#### Build DocC Archive in Xcode
+### Preview Documentation Locally
 
-Generate a DocC Archive in Xcode. This documentation will be available under the Workspace Documentation section.
-You will need to export `WebKit` and import it to add the DocC Archive to the Imported Documentation section.
+This will bring up a local web server, so you can see the documentation locally. Any updates you make will be automatically visible.
 
 ```
-Open Package.swift
-Product -> Build Documentation (⌃⇧⌘D)
+mkdocs serve
 ```
 
-### GitHub Release
+### Release Build
 
-Generate documentation for a release on GitHub Pages.
+Build documentation for static site.
 
 ```
-make github
+mkdocs build
+python3 -m http.server --directory site/ # (Optional) View generated documentation
 ```
 
-## Import Documentation into Xcode
+### Overview
 
-Open `WebKit.doccarchive` and the documentation will be automatically imported into Xcode under the Imported Documention section.
-When running `make docc` the documentation will automatically be imported into Xcode.
+The documentation uses the [Material for MkDocs](https://squidfunk.github.io/mkdocs-material/) theme. This documentation has been collected from a variety of sources including [Trac](https://trac.webkit.org),[GitHub Wiki](https://github.com/WebKit/WebKit/wiki), and Source Code markdown files.