feat: nested selectors with lightningcss.

[knightedcodemonkey]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 97.61905% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 90.71%. Comparing base (b60f336) to head (34f0aed).

Files with missing lines	Patch %	Lines
packages/css/src/css.ts	96.77%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #92      +/-   ##
==========================================
+ Coverage   90.67%   90.71%   +0.04%     
==========================================
  Files          18       18              
  Lines        6496     6535      +39     
  Branches     1176     1178       +2     
==========================================
+ Hits         5890     5928      +38     
- Misses        569      570       +1     
  Partials       37       37              

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[Copilot]

Pull request overview

Adds Lightning CSS draft nesting support (enabled by default) so nested selectors work in CSS Modules, and updates related dependencies/CI tooling to support the change.

Changes:

• Enable drafts.nesting by default when running Lightning CSS transforms, while preserving the ability to explicitly disable it.
• Add fixtures and tests validating nested selector handling for CSS Modules (Node + browser/WASM paths).
• Bump package versions and update CI/workflow toolchain versions (Node matrix and GitHub Actions).

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/playwright/package.json	Updates fixture app dependencies to consume @knighted/css@1.2.1 and newer @knighted/jsx.
packages/css/test/fixtures/misc/module-nesting/entry.js	Adds a JS entry fixture importing a CSS module for nesting coverage.
packages/css/test/fixtures/misc/module-nesting/button.module.css	Adds a CSS Modules fixture using nested selectors (&:hover).
packages/css/test/css.test.ts	Adds a test asserting nested selectors work with Lightning CSS defaults in CSS Modules mode.
packages/css/test/css.browser.test.ts	Extends the browser/WASM transform hook test to ensure drafts.nesting is passed through.
packages/css/src/css.ts	Introduces a narrow local type widening and defaults drafts.nesting to true in normalized Lightning CSS options.
packages/css/src/browser.ts	Extends WASM transform typings and passes drafts.nesting: true for CSS Modules in browser mode.
packages/css/package.json	Bumps package version and pins lightningcss dependency to 1.30.1; updates oxc-parser.
package.json	Updates dev tool dependencies and adds overrides to pin lightningcss and constrain c8’s yargs.
.github/workflows/publish.yml	Updates action versions and Node version used for publishing.
.github/workflows/playwright.yml	Updates action versions and Node versions used for Playwright E2E runs.
.github/workflows/ci.yml	Expands the Node matrix and updates action versions, including Codecov action.

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