fix: Load plain dynamically

[zomars]

What does this PR do?

Prevents warnings on environments where Plain is not setup.

This pull request includes several changes to update the environment variable PLAIN_CHAT_ID to NEXT_PUBLIC_PLAIN_CHAT_ID and to dynamically import the PlainChat component. The most important changes include modifications to environment variables, API route handling, and component imports.

Environment variable updates:

• .env.example: Changed PLAIN_CHAT_ID to NEXT_PUBLIC_PLAIN_CHAT_ID.
• turbo.json: Updated the environment variable from PLAIN_CHAT_ID to NEXT_PUBLIC_PLAIN_CHAT_ID.

API route handling:

• apps/web/app/api/plain-hash/route.ts: Updated the appId to use process.env.NEXT_PUBLIC_PLAIN_CHAT_ID instead of process.env.PLAIN_CHAT_ID.

Component imports:

• apps/web/lib/app-providers-app-dir.tsx: Changed the import of PlainChat to use dynamicProvider.
• apps/web/lib/app-providers.tsx: Changed the import of PlainChat to use dynamicProvider.
• apps/web/lib/plain/dynamicProvider.tsx: Added dynamic import logic for PlainChat based on the presence of NEXT_PUBLIC_PLAIN_CHAT_ID.

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. If N/A, write N/A here and check the checkbox.
• I confirm automated tests are in place that prove my fix is effective or that my feature works.

How should this be tested?

• Are there environment variables that should be set?
• What are the minimal test data to have?
• What is expected (happy path) to have (input and output)?
• Any other important info that could help to test that PR

Checklist

• I haven't read the contributing guide
• My code doesn't follow the style guidelines of this project
• I haven't commented my code, particularly in hard-to-understand areas
• I haven't checked if my changes generate no new warnings

[graphite-app]

Graphite Automations

"Add foundation team as reviewer" took an action on this PR • (01/09/25)

1 reviewer was added to this PR based on Keith Williams's automation.

[zomars]

Already matched NEXT_PUBLIC_PLAIN_CHAT_ID to our current PLAIN_CHAT_ID in production.

[github-actions]

E2E results are ready!

• Workflow #44855.1 latest results

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