feat: improve command handling

[lucaaszsx]

Summary

Improves command handling with early validation and better error messages, and adds dev environment awareness for command loading.

Changes

• config.ts: add isProduction getter based on NODE_ENV
• manager.ts: use isBun || isDev to load commands from src/ in dev environment; add exists() method for early command validation
• messageCreate.ts: use exists() for early return before building context; distinguish between unknown command and failed execution error messages

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Summary by cubic

Improves command handling with early validation and clearer errors, and loads commands from src/ in dev or Bun for faster local development. Adds config.isProduction based on NODE_ENV.

• New Features

  • Added config.isProduction getter (NODE_ENV === 'production').
  • Command manager loads from src/ in Bun or non‑production; uses dist/ in production Node.
  • Added exists() for early command validation and short-circuiting.
  • Clearer replies: unknown command vs execution failure.

• Bug Fixes

  • Safely parse content-length with Number(...) in remote upload.
  • Explicit Express typings for app and Router to resolve TS errors.

^{Written for commit acd1523. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

1 issue found across 12 files

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