readseek 0.9.3

readseek:
- search: lexical search for documents (Jarkko Sakkinen)
- Use clean-break document cache upgrades (Jarkko Sakkinen)
- build(deps): bump serde_json from 1.0.150 to 1.0.151 (dependabot[bot])
- build(deps): bump zerocopy from 0.8.54 to 0.8.55 (dependabot[bot])
- release: update npm package integrity metadata (Jarkko Sakkinen)

pi-readseek:
- release: update npm package integrity metadata (Jarkko Sakkinen)

opencode-readseek:
- release: update npm package integrity metadata (Jarkko Sakkinen)

claude-readseek:
- release: update npm package integrity metadata (Jarkko Sakkinen)

readseek.vim:
- Merged readseek.vim into this repository.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@iki.fi>