Refresh docs and release metadata for v0.0.12

[BunsDev]

Summary

• Expanded the root README with a clearer architecture overview, setup workflow, quality gates, release operations, and operational guidance.
• Added/updated release and packaging docs for desktop, mobile, and marketing builds, including Vercel and dependency-install troubleshooting.
• Bumped workspace package versions to 0.0.12 and aligned shared release metadata.
• Tightened several web and marketing components for more stable rendering and fewer React warnings by improving client boundaries, memoized context values, and list keys.

Testing

• Not run locally.
• Intended checks per repo policy: bun fmt, bun lint, bun typecheck.
• Recommended follow-up: bun run test.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
okcode-marketing	Error		Apr 1, 2026 11:15am
v0-compute-the-platform-to-build	Error		Apr 1, 2026 11:15am

[vercel]

Deployment failed with the following error:

The `vercel.json` schema validation failed with the following message: should NOT have additional property `rootDirectory`

Learn More: https://vercel.com/docs/concepts/projects/project-configuration