rename ss-tools to superset-tools across the entire project

- Replace all occurrences of 'ss-tools' with 'superset-tools' in 104 files
- Rename git bundle file ss-tools.bundle → superset-tools.bundle
- Update .gitignore pattern accordingly
- Preserve variable names (hasSsTools etc.) and code identifiers

docs/api/doxygen_grace.txt

@@ -17224,7 +17224,7 @@
 
 // --- PlaywrightConfig (frontend/playwright.config.js)
 /**!
- * @brief Playwright E2E test configuration for ss-tools frontend.
+ * @brief Playwright E2E test configuration for superset-tools frontend.
  * @complexity 3
  * @invariant All E2E tests run against a fully deployed stack (DB + backend + frontend).
  * @ux_state ConfigLoaded -> Browser contexts are created with predefined env settings.