Improve KiCad test workflow and separate from wxWidgets tests

- npm run test:kicad now auto-runs setup script first
- Create separate playwright-kicad.config.ts for KiCad tests
- Fix kicad spec to use web server instead of file:// paths
- Remove duplicate pcbnew.html/wasm from tests/kicad/
  (proper files are in tests/apps/kicad/)

Test separation:
- npm test: runs only wxWidgets tests (tests/e2e/)
- npm run test:kicad: runs only KiCad tests (tests/kicad/)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/package.json

@@ -9,8 +9,8 @@
     "build-wasm": "cd apps && make -f Makefile.wasm",
     "serve": "npx serve apps -p 8080 -c ../serve.json",
     "setup:kicad": "./scripts/setup-kicad-wasm.sh",
-    "test:kicad": "playwright test kicad/",
-    "test:kicad:headed": "playwright test kicad/ --headed"
+    "test:kicad": "npm run setup:kicad && playwright test --config=playwright-kicad.config.ts",
+    "test:kicad:headed": "npm run setup:kicad && playwright test --config=playwright-kicad.config.ts --headed"
   },
   "devDependencies": {
     "@playwright/test": "^1.40.0",