Switch HCL configuration to XML

[geoffjay]

• feat: add footer bar support
• refactor: create project module
• refactor: move workspace code into module
• feat: support env for extension dirs
• chore: ignore claude worktrees
• feat: implement XML for configurations
• doc: update hcl references to xml
• doc: update more hcl references to xml

[codecov]

Codecov Report

❌ Patch coverage is 72.76995% with 116 lines in your changes missing coverage. Please review.
✅ Project coverage is 52.14%. Comparing base (01e59d6) to head (ec0ac65).
⚠️ Report is 12 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/nemo-config/src/xml_parser.rs	74.69%	104 Missing ⚠️
crates/nemo-extension/src/rhai_engine.rs	0.00%	10 Missing ⚠️
crates/nemo-config/src/loader.rs	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #2      +/-   ##
==========================================
+ Coverage   50.42%   52.14%   +1.72%     
==========================================
  Files          71       71              
  Lines        5694     6014     +320     
==========================================
+ Hits         2871     3136     +265     
- Misses       2823     2878      +55     

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