docs: Add Sage Language Server to Implementations.md

[SeanDictionary]

Description (e.g. "Related to ...", etc.)

Add Sage Language Server to Implementations.md

Code review checklist (for code reviewer to complete)

• Pull request represents a single change (i.e. not fixing disparate/unrelated things in a single PR)
• Title summarizes what is changing
• Commit messages are meaningful (see this for details)
• Tests have been included and/or updated, as appropriate
• Docstrings have been included and/or updated, as appropriate
• Standalone docs have been updated accordingly

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[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds a new entry to the implementations list to include the SageMath language server.

Changes:

• Added “Sage Language Server” entry (author, repo link, and description) to the table in Implementations.md.

Comments suppressed due to low confidence (1)

Implementations.md:1

• The GitHub profile link uses https://github.com/seandictionary while the repository link uses https://github.com/SeanDictionary/... (case mismatch). GitHub is case-insensitive, but this is inconsistent within the same row and can look like two different accounts. Please standardize casing across both links (prefer the canonical casing shown by the GitHub org/user and repo URL).

# Implementations Based on _pygls_

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[tombh]

Thank you.