Add a "Resolving Conflicts in GitHub PRs" section to AGENTS.md with
step-by-step instructions for force-fetching refs, rebasing, resolving
lockfile conflicts, and verifying mergeability.
Add shell/resolve-pr-conflicts.sh that automates the workflow: fetches
metadata, force-updates the base ref, rebases, auto-resolves lockfile
conflicts via pnpm install, force-pushes, and verifies the result.
When `wt` is called with a PR number, automatically launch Claude Code
to analyze the PR diff, read review comments, resolve merge conflicts
with the base branch, fix issues, and run tests.
Adds a `pnpm worktree:new <branch>` script that creates a git worktree
as a sibling directory of the repo root, with branch slashes replaced by
dashes (e.g. `feat/foo` → `../feat-foo`). Shell helpers in `shell/wt.fish`
and `shell/wt.sh` wrap the script to also `cd` into the new worktree.
Documents setup and usage in CONTRIBUTING.md.
