Allow Ignoring Specific Libraries for Strict Type Checking in Pyright

It would be great to have a way to exclude specific third-party libraries from strict type checking, without disabling strict mode globally or having to manually suppress each individual error.

### 💡 **Use Case**

Many widely used libraries (e.g., certain Discord API wrappers, web frameworks, or older APIs) either:

* Do **not ship proper type stubs**, or
* Use **incomplete or dynamically-typed interfaces**

This leads to **unresolvable Pyright errors** in strict mode — especially `reportUnknownMemberType`, `reportUnknownArgumentType`, and `reportGeneralTypeIssues` — even when the code works perfectly at runtime.

### ✅ **Proposed Solution**

An option in `pyrightconfig.json`, something like:

```json
{
"typeCheckingMode": "strict",
"ignoreLibraries": ["discord", "some_legacy_package"]
}
```

### 🔍 **Why It Matters**

This would:

* Keep strict mode usable without drowning in 3rd-party errors
* Avoid cluttering the codebase with `# type: ignore` comments
* Improve developer experience when using popular, loosely-typed libraries

Start with Pyright's pyrightconfig.json handling and the strict type-checking diagnostics named in the issue. Determine how an ignoreLibraries option should identify third-party packages and which diagnostics it affects. Done means strict checking remains enabled for project code while configured libraries no longer produce the targeted errors.

Written by the indexing model from the issue text.