feat(vscode): add info to hover

[benfdking]

[Copilot]

Pull Request Overview

This PR enhances VSCode hover tooltips by replacing plain descriptions with rich markdown tables detailing model columns.

• Introduce generate_markdown_description to build a markdown table of columns.
• Change Reference.description to Reference.markdown_description and wire it through LSP hover.
• Update tests to assert on the new markdown_description content.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
tests/lsp/test_reference.py	Updated assertions to check markdown_description table
sqlmesh/lsp/description.py	New file: generates markdown table from model metadata
sqlmesh/lsp/reference.py	Swapped out description field for markdown_description and call generator
sqlmesh/lsp/main.py	Hover now uses markdown_description for tooltip content

Comments suppressed due to low confidence (2)

sqlmesh/lsp/description.py:19

• The variable name type shadows the built-in type; consider renaming to column_type or similar for clarity.

f"| {column} | {type} | {column_descriptions.get(column, '')} |"

sqlmesh/lsp/reference.py:29

• The docstring still refers to description; it should be updated to markdown_description to match the actual field.

description: The description of the referenced model