Fix Broken Link, Rest of Missing Images, Updated Supported Langs (#96)

* Went back to old doc commit to fetch the rest of the missing images
* Fixed a broken link
* Updated "Supported Languages" table

Author: DavidBakerEffendi

docs.joern.io/.gitignore

@@ -1,3 +1,4 @@
 resources
 *.lock
-themes
+themes
+**/**.DS_Store

docs.joern.io/content/_index.md

@@ -18,16 +18,21 @@ for vulnerability discovery and research in static program analysis.
 
 ## Supported languages
 
-| Name         | Based on     | Maturity |
+| Name         | Built with   | Maturity |
 |--------------|--------------|----------|
-| C/C++        | Fuzzy Parser | High     |
 | C/C++        | Eclipse CDT  | High     |
+| Java         | JavaParser   | High     |
+| JavaScript   | GraalVM      | High     |
+| Python       | JavaCC       | High     |
 | x86/x64      | Ghidra       | Medium   |
-| JVM          | Soot         | Medium   |
-| Javascript   | GraalVM      | Medium   |
-| Javasrc      | javaparser   | Medium   |
+| JVM Bytecode | Soot         | Medium   |
 | Kotlin       | IntelliJ PSI | Medium   |
-| Python       | Custom       | Medium   |
+| PHP          | PHP-Parser   | Medium   |
+| Go           | go.parser    | Low      |
+| Ruby         | ANTLR        | Low      |
+| Swift        | SwiftSyntax  | Low      |
+| C#           | Roslyn       | Low      |
+
 
 ## Core features
 

docs.joern.io/content/c-syntaxtree.md

@@ -15,7 +15,7 @@ discuss the limitations of syntax-tree queries at length.
 {{< hint info >}}
 If you find that the terminology used in this article is foreign to
 you, we hope that our [article on Code Property
-Graphs](code-property-graph) can help you out.
+Graphs](/code-property-graph/) can help you out.
 {{< /hint >}}
 
 ## What are Abstract Syntax Trees?

docs.joern.io/content/extensions.md

@@ -80,7 +80,7 @@ run
 
 You should see the sample plugin named `gitextension` in the overview
 
-![Run output](/img/run.png)
+![Run output](/images/run.png)
 
 
 You can inspect and modify the options of the example plugin via
@@ -100,21 +100,21 @@ following instructions are for IntelliJ 2020.1.1.
 
 Choose "Open or Import" to import the project.
 
-![IntelliJ start screen](/img/startscreen.png)
+![IntelliJ start screen](/images/startscreen.png)
 
 
 Next, select the directory from the file selector. Assuming that your
 IntelliJ installation has support for `sbt` installed, the import is
 fully automated.
 
-![Just select the project](/img/select.png)
+![Just select the project](/images/select.png)
 
 
 Finally, navigate to `src/test/scala/io/shiftleft/gitextension` and
 click on `GitextentionTests`. You can right-click on the class or the
 individual tests to run them.
 
-![Right click](/img/runtests.png)
+![Right click](/images/runtests.png)
 
 
 ## Building a shippable plugin