expand: repo auto-detect, --web, editor, PR diff/checks/ready/review/status, repo lifecycle, api headers/paginate
* CI: pre-push hook (fmt, clippy -D warnings, test, release build) plus
opt-in FJ_E2E=1 smoke. Install via scripts/install-hooks.sh.
* Repo auto-detection from git remote: -R/--repo becomes optional on all
repo-scoped subcommands. Detection prefers `upstream` then `origin`,
honors --host, and parses https/ssh/scp-style URLs.
* `--web` flag wired to every list/view command (open in default browser).
* `$EDITOR` integration for issue/pr create + comment + edit (omit
`--body` to launch your editor; `-` keeps stdin).
* PR: new `diff`, `commits`, `files`, `checks`, `ready`, `review`,
`edit`, `status`, `reopen` subcommands. `view --comments` now shows
reviews too.
* Issue: `edit` and `develop` (creates a branch for the issue).
* Repo: `fork`, `sync`, `edit`, `rename`, `archive`, `unarchive`,
`delete` (with slug-confirmation), `branches`, `topics`.
* `fj api` gains `-H` headers, `--paginate` (follows Link rel=next),
`--include` (response headers), `--silent`. The jq-ish projector now
supports `[N]`/`[-N]` brackets and `|` pipes.
* MSRV bumped to 1.82 (uses `is_none_or`).
* 46 unit tests covering pure logic: hosts CRUD, remote URL parsing,
link header parser, jq projection, branch label fallback, slugify.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>