build: remove unused .zig codegen outputs

[springmin]

The codegen system generates .zig files alongside the actually-used .rs/.cpp/.h files. These .zig files are legacy artifacts from the Zig era - they are no longer compiled or consumed. Removing them reduces codegen steps from 95 to 78.

[claude]

Claude Code Review

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 112f305 and 40e19b6.

📒 Files selected for processing (1)

• scripts/build/codegen.ts

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Walkthrough

scripts/build/codegen.ts removes legacy .zig codegen artifact declarations throughout the codebase. The exported zigFilesGeneratedIntoSrc constant and bindgenV2Zig field from CodegenOutputs are deleted, and all six code emitters stop declaring .zig outputs in their Ninja build steps. The main emitCodegen orchestration no longer invokes emitCiInfo.

Changes

Remove legacy Zig codegen artifacts

Layer / File(s)	Summary
Public contract and exported artifacts scripts/build/codegen.ts	Deleted the exported zigFilesGeneratedIntoSrc constant that previously listed Zig-side generated paths. Removed the bindgenV2Zig: string[] field from the public CodegenOutputs interface.
Codegen orchestration updates scripts/build/codegen.ts	Updated emitCodegen to remove initialization of the now-deleted bindgenV2Zig field. Removed the emitCiInfo(ctx) invocation from the standard emission sequence.
Emitter implementations scripts/build/codegen.ts	Updated emitErrorCode, emitGeneratedClasses, emitCppBind, emitJsModules, emitBindgenV2, and emitBindgen to remove .zig artifacts from Ninja build declarations and output bookkeeping, while preserving C++ headers and Rust source outputs.

🚥 Pre-merge checks | ✅ 3 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The pull request description is incomplete. While it explains what the PR does, it does not follow the required template structure with both 'What does this PR do?' and 'How did you verify your code works?' sections.	Ensure the description follows the template by adding a 'How did you verify your code works?' section that documents the testing approach or verification method used.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The pull request title 'build: remove unused .zig codegen outputs' accurately and concisely summarizes the main change: removing legacy .zig files from the codegen system.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[springmin]

Closing — this fix has been incorporated into PR #30917 (feat: add initial HarmonyOS support), which contains all OHOS changes in a single cohesive PR.

[springmin]

Superseded by #30917