Rename `llcppg.symb.json` to `llcppg.sym.json`

[luoliwoshang]

Currently, the symbol info file is named llcppg.symb.json, but the common and widely accepted abbreviation for symbol is sym, not symb.

• sym is the standard short form used in most compilers and linkers (e.g., nm, objdump, LLVM symbol tables).

• Improves consistency and readability.

• Reduces naming confusion for new contributors.

[luoliwoshang]

/code

[xgopilot]

✅ Rename completed successfully!

I've successfully renamed llcppg.symb.json to llcppg.sym.json throughout the codebase.

What was done:

✅ File Renames (20 files)

• Renamed all test data files from llcppg.symb.json to llcppg.sym.json

✅ Code Updates (6 files)

• config/config.go: Updated LLCPPG_SYMB constant
• config/load.go: Updated comment
• cmd/llcppg/llcppg.go: Updated flag description
• cl/internal/convert/funcname.go: Updated comment
• _cmptest/llcppgend_test.go: Updated comment

✅ Documentation Updates (2 files)

• CLAUDE.md: Updated references in test structure examples
• doc/en/dev/llcppg.md: Updated all mentions in technical documentation

✅ Validation

• Build successful: go build -v ./...
• Unit tests passing: All core package tests passed
• Code quality: go fmt and go vet passed

Pull Request

Created PR #580: #580

The rename uses the industry-standard sym abbreviation (as used in nm, objdump, LLVM) instead of symb, improving consistency and reducing confusion for contributors.

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Branch: xgopilot/claude/issue-579-1760683830
Commit: 0a2c844