docs: improved README.md

[DrKJeff16]

Description

Made improvements to README.md, including a better description.

[gemini-code-assist]

Summary of Changes

Hello @DrKJeff16, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the README.md file to provide a more comprehensive and user-friendly overview of the project. The updates aim to clarify the project's core purpose, offer important guidance for users, and refine the listed features, ultimately improving the documentation's clarity and helpfulness for anyone interacting with the repository.

Highlights

• Project Description Update: The main project description in README.md has been expanded to clearly state its purpose: providing LuaCATS-like type annotations for WezTerm configurations.
• Important Usage Note Added: An 'IMPORTANT' callout has been added to guide users to double-check unclear types against the official WezTerm Lua Reference.
• Features Section Refinement: The 'Features' section now explicitly lists 'LuaCATS-like type annotations' and clarifies 'Function overrides' with an example. Additionally, 'VSCode support' has been broadened to include 'VSCodium support'.
• Stylistic Improvements: Minor stylistic changes were made, such as removing <ins> tags from example summaries for a cleaner look.

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[gemini-code-assist]

Code Review

This pull request improves the README.md by providing a more detailed project description, adding an important disclaimer, and clarifying the feature list. The changes are positive and enhance the clarity of the documentation. I've suggested a few minor improvements to further enhance readability and simplify the HTML markup within the file.