Fix GitHub CI lint and formatting errors

[yokuze]

I have fixed several linting and formatting issues that were likely causing the GitHub CI failures on the main branch.

Key changes:

1. TypeScript Linting: Removed unused PLUGIN_VERSION_CARGO imports and fixed whitespace issues in packages/mcp-server/src/prompts-registry.ts and packages/mcp-server/src/tools-registry.ts.
2. Rust Formatting: Ran cargo fmt in packages/tauri-plugin-mcp-bridge to fix formatting inconsistencies.
3. Verification: Verified that npm run eslint and cargo fmt -- --check now pass successfully. Unit tests for both the MCP server and the Rust plugin also pass.
4. Cleanup: Removed a large log file (packages/test-app/tauri_dev.log) that was accidentally created during the investigation.

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PR created automatically by Jules for task 2257419898391673200 started by @yokuze

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