Feature Request: Allow more generic project and language specific settings

[r1ci]

Currently, Zed only allows a small subset of settings to be project-specific or language-specific (defined in the ProjectSettings and LanguageSettings structs). This is limiting compared to how VSCode handles settings, where almost any setting can be overridden at the project or language level.

Use Cases

• Font size customization per language: For example, using a smaller buffer_font_size for Rust files but a larger one for Markdown files.
• Project-specific font choices for aesthetic reasons.

Potential Implementation Approaches

Short-term solution

Expand the existing ProjectSettings and LanguageSettings structs to include more reasonable settings, and update the corresponding code to respect these overrides.

Long-term solution

Implement a more general settings scheme that allows any setting to be overridden at the project or language level, similar to VSCode's approach. This would provide maximum flexibility for users to customize their editing experience.

Would love to hear thoughts from the team on how feasible this might be for a future release!