dargor/zed-python-requirements

AI Summary: This issue requests adding support for `TODO` flag highlighting within Zed's syntax files. This capability is now available thanks to a recent pull request and the `zed-comment` tool, and the task is expected to be straightforward integration.

AI Summary: Update the Zed extension for Python requirements and constraints syntax highlighting to use the latest version (v0.5.0) of the tree-sitter-requirements grammar. This involves updating the dependency and potentially adjusting the extension code to accommodate any changes in the grammar.