build(deps): bump github.com/goplus/llgo from v0.12.2 to v0.13.0

[xgopilot]

Requested by @luoliwoshang

Closes #667

Summary

• Updated github.com/goplus/llgo dependency from v0.12.2 to v0.13.0 in go.mod and go.sum
• Updated llgo version in all CI workflow files (go.yml, end2end.yml, gentest.yml) and the setup action (action.yml)

Changes

File	Change
go.mod	github.com/goplus/llgo v0.12.2 → v0.13.0
go.sum	Updated checksums
.github/workflows/go.yml	llgo: [v0.12.2] → [v0.13.0]
.github/workflows/end2end.yml	llgo: [v0.12.2] → [v0.13.0]
.github/workflows/gentest.yml	llgo: [v0.12.2] → [v0.13.0]
.github/actions/setup-llcppg/action.yml	Default llgo v0.12.2 → v0.13.0

Test plan

• Unit tests pass (config, internal/name, internal/arg, internal/unmarshal)
• go vet passes on all standard Go packages
• CI workflows will validate full test suite with llgo v0.13.0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.32%. Comparing base (21fa54b) to head (69bb2ae).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #668   +/-   ##
=======================================
  Coverage   83.32%   83.32%           
=======================================
  Files          28       28           
  Lines        2500     2500           
=======================================
  Hits         2083     2083           
  Misses        369      369           
  Partials       48       48           

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[luoliwoshang]

@xgopilot okay!make a .claude/skills for update llgo version! create another pr!

[xgopilot]

Created .claude/skills for llgo version update

Created .claude/skills/update-llgo-version.md with a skill document that describes the complete procedure for bumping the github.com/goplus/llgo dependency. The skill covers all 6 files that need to be updated consistently:

• go.mod / go.sum
• .github/workflows/go.yml, end2end.yml, gentest.yml
• .github/actions/setup-llcppg/action.yml

PR: #669

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[luoliwoshang]

LGTM

[luoliwoshang]

@xgopilot okay!make a .claude/skills for update llgo version! create another pr!

[xgopilot]

Created .claude/skills for llgo version updates

Created .claude/skills/update-llgo-version.md with step-by-step instructions for bumping the llgo version across all relevant files (go.mod, go.sum, CI workflows, and the setup action), including verification steps and commit message conventions.

PR: #672

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