Add PyGhidra Crusader Toolkit and patch scripts

- Introduced README.md for the PyGhidra Crusader Toolkit, detailing setup and usage instructions.
- Added bootstrap_env.ps1 script to create and refresh the Python virtual environment with necessary packages.
- Implemented _tmp_patch_hidden_cheat_menu.py and _tmp_patch_hidden_cheat_menu_deferred.py scripts for patching specific memory addresses in Ghidra.

.github/skills/pyghidra-ghidra-ops/SKILL.md

@@ -1,3 +1,8 @@
+---
+name: pyghidra-ghidra-ops
+description: Local PyGhidra fallback workflow for Crusader Ghidra edits and queries
+---
+
 # PyGhidra Ghidra Ops
 
 Use this skill when Ghidra MCP is missing a needed operation and you need native CPython access to the Ghidra API for the local Crusader project.
@@ -13,12 +18,13 @@ Use this skill when Ghidra MCP is missing a needed operation and you need native
 
 ## Workspace Defaults
 
-- Ghidra install dir: `I:\Apps\ghidra_11.3.2_PUBLIC`
+- Ghidra install dir: `I:\Apps\ghidra_12.0.4_PUBLIC`
 - Ghidra project dir: repo root
 - Ghidra project name: `Crusader`
 - Default program: `CRUSADER-RAW.EXE`
 - Local Python env: `.venv-pyghidra311`
 - CLI entrypoint: `.\.venv-pyghidra311\Scripts\python.exe -m tools.pyghidra_crusader`
+- Bootstrap script: `.\tools\pyghidra_crusader\bootstrap_env.ps1`
 
 ## Constraints
 
@@ -27,6 +33,12 @@ Use this skill when Ghidra MCP is missing a needed operation and you need native
 - Write operations require the project to be openable for modification. If `Crusader.lock` is present because the GUI owns the project, close Ghidra first or work on a copy.
 - Keep `crusader_decompilation_notes.md` updated after verified repair batches.
 
+Refresh the local PyGhidra environment when the bundled Ghidra version changes:
+
+```powershell
+powershell -ExecutionPolicy Bypass -File .\tools\pyghidra_crusader\bootstrap_env.ps1
+```
+
 ## Commands
 
 List root project files: