chore: tsc v7 workflow.

[knightedcodemonkey]

No description provided.

[Copilot]

Pull request overview

This PR updates the repo’s TypeScript “v7/RC” compatibility posture by adding a dedicated GitHub Actions workflow and adjusting test fixtures/dependencies to align with newer TypeScript import-attribute syntax and the updated toolchain.

Changes:

• Add a new typescript-v7 GitHub Actions workflow that installs typescript@rc and runs build + tests.
• Update TypeScript fixture sources and an integration sourcemap assertion to use more specific matching and the with { 'resolution-mode': 'import' } form.
• Update dependency metadata to allow newer TypeScript versions and bump Vite to v8 (with corresponding lockfile changes).

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/integration.js	Makes the sourcemap token search more specific (function greet) to stabilize tracing.
test/__fixtures__/plain/src/index.ts	Updates fixture import-attribute syntax and formatting used by integration output assertions.
test/__fixtures__/compileErrors/src/cjs.cts	Updates fixture syntax (with { ... }) and formatting for TS RC compatibility.
test/__fixtures__/cjsProject/src/cjs.cts	Normalizes fixture formatting and import-attribute syntax.
package.json	Broadens TypeScript peer range and adds optional typescript-rc; bumps Vite to v8.
package-lock.json	Lockfile updates reflecting the Vite v8 upgrade and dependency tree changes.
.github/workflows/typescript-v7.yml	Adds a CI job that installs typescript@rc and runs build/test on Node 24.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.57%. Comparing base (512f729) to head (fa36671).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #121   +/-   ##
=======================================
  Coverage   93.57%   93.57%           
=======================================
  Files           4        4           
  Lines        2209     2209           
=======================================
  Hits         2067     2067           
  Misses        142      142           

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