message: feat(README): add deno docs link
diff: ## Usage
  -Right now, the package is not published anywhere, as its not completely usable.
  -You can import it from this Raw GitHub URL: https://raw.githubusercontent.com/harmony-org/harmony/main/mod.ts
  +You can import the package from https://deno.land/x/harmony/mod.ts (with latest version) or can add a version too, and raw GitHub URL (latest unpublished version) https://raw.githubusercontent.com/harmony-org/harmony/main/mod.ts too.
  For a quick example, run this:
  @@ -108,7 +107,9 @@ client.connect('super secret token comes here', Intents.All)
  ## Docs
  -Not made yet.
  +Documentation is available for `main` (branch) and `stable` (release).
  +- [Main](https://doc.deno.land/https/raw.githubusercontent.com/harmony-org/harmony/jsdoc/mod.ts)
  +- [Stable](https://doc.deno.land/https/deno.land/x/harmony/mod.ts)
  ## Found a bug or want support? Join our discord server!
  