fix(python): add pylance as its own optional dependency (#2336)

This change allows to centrally manage the plance depndency without
everybody needing to monitor for compatibility manually.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced an optional dependency that enhances development support.
Users can now benefit from improved static analysis capabilities when
installing the recommended version (0.23.2 or later).

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

python/pyproject.toml

@@ -43,6 +43,9 @@ classifiers = [
 repository = "https://github.com/lancedb/lancedb"
 
 [project.optional-dependencies]
+pylance = [
+    "pylance>=0.23.2",
+]
 tests = [
     "aiohttp",
     "boto3",