Bump version to 0.1.0

Bump version to 0.0.4

Improve marketplace metadata, README, and add icon

- Update displayName, description, keywords, categories, repository URLs
- Add icon.png (512x512, indigo background)
- Rewrite README with features list and cleaner install instructions
- Bump version to 0.0.3

Bump version to 0.0.2

Remove files field from package.json to fix vsce packaging