Fix time tracking for languages with primary LSP (e.g. Python)

[prettyirrelevant]

Problem

Time tracking is significantly under-reported for Python files. For example, 4+ hours of editing results in only ~20 minutes being recorded. Other languages work correctly.

Root Cause

Python has Pyright as the built-in/primary language server in Zed. When multiple LSPs are registered for the same language, Zed may not route all text document events to secondary language servers like wakatime-ls.

The current LSP capability declaration uses the minimal TextDocumentSyncKind::INCREMENTAL which doesn't explicitly request open/close and save notifications.

Related: zed-industries/zed#24100

Fix

• Use TextDocumentSyncOptions instead of TextDocumentSyncKind to explicitly declare that wakatime-ls needs open_close, change, and save events
• Remove empty string and duplicate entry from the languages list in extension.toml