chore(repo): ignore local .wrangler/ state directory

[SaharPak]

Summary

Single-line gitignore cleanup before developer handoff.

Wrangler / opennextjs-cloudflare preview leaves a miniflare cache SQLite database under .wrangler/state/. It is local runtime scratch, regenerated on every wrangler dev session, and is showing as untracked on checkouts of main.

Change

 # opennext / cloudflare build output
 /.open-next/

+# wrangler local state (preview deploys, dev mode scratch)
+/.wrangler/

 # production
 /build

Why a PR for this small change

• Same change is already on the unmerged feat/cloudflare-adapter branch — applying it on main keeps the two aligned.
• Without the ignore, every git status shows .wrangler/ as untracked, which is noise during a handoff.

Validation

• npm run lint — clean
• npm run build — clean (14 routes)
• BASE_URL=http://localhost:3000 bash ./scripts/auth-smoke.sh — 16 passed, 0 failed
• git status after commit — working tree clean

Out of scope

• No code changes.
• No auth / new-user onboarding changes (the Tech Immigrants Gmail login issue mentioned elsewhere is intentionally left for the next developer).
• No Cloudflare deploy work.
• No secrets, no .env.local content, no .dev.vars.