fix: exclude sample and coverage folders from package

- Added sample/ and coverage/ to .vscodeignore
- Reduces package size by ~1MB
- Aligns with production standards from other LE extensions

Author: nolindnaidoo

.vscodeignore

@@ -12,6 +12,8 @@ vitest.config.ts
 docs/
 src/**/*.test.ts
 test/
+sample/
+coverage/
 README-STRINGLE.md
 src/
 !src/assets/images/preview.gif