refactor: create registry, cfg, and resolution packages

[shivasurya]

This PR establishes the infrastructure core by creating three new packages that resolve circular dependencies and improve code organization. The registry package handles module discovery, builtin type information, and attribute tracking. The cfg package manages control flow graph construction. The resolution package defines type resolution structures for variable bindings and function scopes. All original files have been updated with type aliases to maintain complete backward compatibility.

Verification completed with gradle buildGo showing successful compilation with no circular import errors, gradle testGo confirming all test suites pass across callgraph, registry, cfg, and resolution packages, and gradle lintGo reporting zero issues. Test coverage ranges from 95.9% to 100% across the new packages.

🤖 Generated with Claude Code

[safedep]

SafeDep Report Summary

No dependency changes detected. Nothing to scan.

_{This report is generated by SafeDep Github App}

[codecov]

Codecov Report

❌ Patch coverage is 95.92199% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.07%. Comparing base (6b53218) to head (704cadc).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...urcecode-parser/graph/callgraph/registry/module.go	76.19%	5 Missing and 5 partials ⚠️
sourcecode-parser/graph/callgraph/cfg/cfg.go	93.49%	4 Missing and 4 partials ⚠️
...rcecode-parser/graph/callgraph/registry/builtin.go	98.75%	2 Missing and 2 partials ⚠️
sourcecode-parser/graph/callgraph/cfg.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #373   +/-   ##
=======================================
  Coverage   80.07%   80.07%           
=======================================
  Files          69       74    +5     
  Lines        6836     6857   +21     
=======================================
+ Hits         5474     5491   +17     
- Misses       1139     1142    +3     
- Partials      223      224    +1     

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[shivasurya]

• refactor: Extract builder logic to builder/ package (#7) #378
• refactor: Create patterns package for pattern detection (PR #6) #377
• refactor(callgraph): Move advanced resolution to resolution package (PR #5) #376
• refactor(callgraph): Create resolution package and complete extraction package (PR #4) #375
• refactor(callgraph): Create analysis/taint, extraction packages and complete registry #374
• refactor: create registry, cfg, and resolution packages #373 👈 (View in Graphite)
• refactor: create core package with foundation types #372
• main

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[shivasurya]

Merge activity

• Nov 16, 12:00 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Nov 16, 12:01 AM UTC: Graphite rebased this pull request as part of a merge.
• Nov 16, 12:02 AM UTC: @shivasurya merged this pull request with Graphite.