Add recommended tool versions to Getting Started

documentation/gettingstarted.md

@@ -24,12 +24,22 @@ You'll need a few things to get a decompilation workflow ready:
     can find it
 - The [Git](https://git-scm.com/) version control tool to clone and work on
   this repository
+- [Java](https://jdk.java.net/archive/) 21 or later, as required by Ghidra.
+  You may already have it; Minecraft apparently provides Java 21, for instance.
+  Later versions should also work; 21 and 25 specifically have been confirmed
+  to work fine.
 - The [Ghidra](https://github.com/NationalSecurityAgency/ghidra) reverse
-  engineering tool to analyze and browse the executable
+  engineering tool to analyze and browse the executable (version 12.0.3 is
+  strongly recommended, as the extensions have releases for this exact version)
 - The [XBE extension](https://github.com/XboxDev/ghidra-xbe) for Ghidra to
-  import and analyze the JSRF executable
+  import and analyze the JSRF executable (version will depend on your Ghidra
+  version; ideally it will match your Ghidra version, like
+  [12.0.3](https://github.com/XboxDev/ghidra-xbe/releases/tag/build-202602250354))
 - The [delinker extension](https://github.com/boricj/ghidra-delinker-extension)
-  for Ghidra to export object files from the executable
+  for Ghidra to export object files from the executable (version again depends
+  on Ghidra version;
+  [v0.8.0](https://github.com/boricj/ghidra-delinker-extension/releases/tag/v0.8.0)
+  provides a download for Ghidra 12.0.3 specifically)
 - The [objdiff](https://github.com/encounter/objdiff) code diffing tool to
   compare your C++ code's compiled output to the delinked object files