Rewrite step definitions with inline detection logic

- Replace abstraction functions with inline regex patterns in step definitions
- Add clear test outcomes: Pass/Fail for testable features, Pending with
  specific prefixes (NOT IMPLEMENTED, CANNOT TEST, WRONG STEP, NOT ON THIS
  SCREEN) for non-testable features
- Fix GherkinHighlighter to use step.text instead of step.originalLine
  for step definition matching
- Update documentation with Test Outcomes section
- Extend test:cucumber script to run all parsing steps

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

package.json

@@ -7,7 +7,7 @@
     "dev": "bun --hot src/index.ts",
     "start": "NODE_ENV=production bun src/index.ts",
     "build": "bun run build.ts",
-    "test:cucumber": "bun run cucumber:run && bun run cucumber:report",
+    "test:cucumber": "bun run cucumber:run && bun run cucumber:report && bun run features:parse && bun run steps:extract",
     "cucumber:run": "node --import tsx/esm node_modules/.bin/cucumber-js --config cucumber.json",
     "cucumber:report": "bun scripts/parse-test-results.ts",
     "features:parse": "bun scripts/parse-features.ts",