chore: add deployment for native hosting

[chanceaclark]

What/Why?

Adds CI/CD for deploying the Catalyst storefront to BigCommerce Native Hosting using the @bigcommerce/catalyst alpha CLI and @opennextjs/cloudflare.

This PR includes:

• Native Hosting workflow (.github/workflows/native-hosting.yml) — builds and deploys the storefront on pushes to canary and on PRs
• Proxy-to-middleware conversion step — automatically converts Next.js 16's proxy.ts to middleware.ts at build time (renames the file, swaps the export, adds runtime: 'experimental-edge') so the OpenNext/Cloudflare build works without maintaining a separate middleware.ts in the repo
• Alpha CLI + changeset pre-release setup — versions @bigcommerce/catalyst as 1.0.0-alpha.x with changesets in pre mode
• CLI improvements included in alpha — auth commands, logs command, --prebuilt deploy, credential resolution, deployment error mapping, telemetry updates, and removal of the dev command

Testing

• Workflow runs on PR open/sync and push to canary
• Verify the "Convert proxy.ts to middleware.ts" step correctly transforms the file before the Next.js build
• Confirm catalyst build and catalyst deploy --prebuilt succeed with the configured secrets/vars

Migration

N/A

[changeset-bot]

⚠️ No Changeset found

Latest commit: e2659fd

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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Project	Deployment	Actions	Updated (UTC)
catalyst	Ready	Preview, Comment	Mar 31, 2026 3:33pm