chore: add The Company Company environment config

[NathanFlurry]

Adds .company/environment.json so The Company Company can build and run this repo in cloud environments.

• install: Node 22 via NodeSource, pnpm via corepack, pnpm install --frozen-lockfile, pnpm build
• prepare: fast idempotent pnpm install --frozen-lockfile
• env: non-interactive corepack

Verified by running the install command to exit 0 in a clean Ubuntu 24.04 sandbox.

[the-company-company]

Co · session: Set up cloud environment configs for 5 repos

• Auto-fix ; feedback on this pull request flows to the session and gets addressed
• Review ; Co reviews new pushes

_{@co <ask> hands Co a task · @co mute pauses · @co archive ends the session}

[the-company-company]

✅ No issues found

_{Reviewed commit 96a9d57.}