readseek 0.9.9

readseek:
- cli: centralize error formatting and exit status (Jarkko Sakkinen)
- engine: typed errors for source maps and cursor state (Jarkko Sakkinen)
- engine: typed validation error for GitFlags (Jarkko Sakkinen)
- engine: typed TryFrom error for ImageFormat (Jarkko Sakkinen)
- engine: typed Language and AnalysisEngine conversions (Jarkko Sakkinen)
- engine: Display and typed parse error for TargetAddress (Jarkko Sakkinen)
- engine: typed FromStr for DocumentFormat and NodeKind (Jarkko Sakkinen)
- engine: typed FromStr error for VisionLevel (Jarkko Sakkinen)
- engine: typed FromStr errors for Format and ImageMode (Jarkko Sakkinen)
- engine: add AnchorError for LINE:HASH parsing (Jarkko Sakkinen)
- engine: add LineHashError for LineHash conversions (Jarkko Sakkinen)
- tracing: drop hardcoded target strings (Jarkko Sakkinen)
- 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-api:
- 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>