fix: eagerly fetch models in config hook for OpenCode >=1.14.47 compatibility (#12) (#14)

* fix: eagerly fetch models in config hook to fix OpenCode >=1.14.47 picker issue (#12)

OpenCode 1.14.47+ reads provider.models eagerly at list time and by copy,
so the previous pattern of hydrating models in-place during the auth loader
hook no longer works. The picker only saw the 4 hardcoded fallback models.

This change makes the config hook eagerly fetch live models from the
/v1/models endpoint when auth is available in the store, ensuring the
full model list is visible to Provider.list on all OpenCode versions.

- Add readAuthFromStore helper to read ~/.local/share/opencode/auth.json
- Refactor createRuntimeConfig to accept options directly for reuse
- Update config hook to await fetchModels before setting provider.models
- Keep loader hook for runtime refresh and fetch interceptor setup

Fixes #12

* fix: address code review feedback for issue-12

- Fix import ordering (Node.js built-ins before internal imports)
- Fix test temp directory leak with try/finally cleanup
- Fix os.homedir() caching by using process.env.HOME directly
- Fix eager fetch bypassing cache by using forceRefresh=false

* chore: bump version to 1.1.2

* chore: fix README.md

* style: address review feedback - fix import ordering and narrow error handling

* chore: ignore .worktrees directory