refactor(transformer/typescript): remove declare declarations and type-only declarations earlier

[Dunqing]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors the TypeScript transformer to more comprehensively handle the removal of TypeScript-specific declarations during transformation. The change expands the filtering logic to remove both declare declarations and type-only declarations earlier in the transformation process.

Key changes:

• Expanded the statement filtering logic to handle more TypeScript declaration types
• Added handling for export declarations with type-only content
• Improved coverage of declare and type-only declarations that should be removed

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Dunqing]

• feat(transformer/class-properties): add debug_assertions for declare class #13907
• refactor(transformer/typescript): remove declare declarations and type-only declarations earlier #13908 👈 (View in Graphite)
• main

---

How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:

• 0-merge - adds this PR to the back of the merge queue
• hotfix - for urgent hot fixes, skip the queue and merge this PR next

You must have a Graphite account in order to use the merge queue. Sign up using this link.

An organization admin has enabled the Graphite Merge Queue in this repository.

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

This stack of pull requests is managed by Graphite. Learn more about stacking.

[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #13908 will not alter performance

_{Comparing 09-19-refactor_transformer_typescript_remove_integer_10_readonly_81999_integer_10_readonly_0_integer_10_readonly_81952_array_readonly_readonly_-569jnrxghikls_0__bin_zsh_integer_10_readonly_0_array_readonly_integer_10_readonly_argc_0 (c5c1672) with main (f067159)}

Summary

✅ 37 untouched