Change terminology from "Hats" to "Presets" throughout codebase

[Copilot]

This PR systematically replaces "Hat" terminology with "Preset" throughout the ContextShare extension to provide clearer, more intuitive naming for users managing collections of AI resources.

What Changed

Core Implementation:

• Renamed HatService → PresetService with all associated methods (discoverHats() → discoverPresets(), applyHat() → applyPreset(), etc.)
• Updated TypeScript interfaces: Hat → Preset, HatSource → PresetSource
• Updated file storage paths: copilot-hats.json → copilot-presets.json, hats/ → presets/ directories

User Interface:

• Menu labels: "Hats" → "Presets"
• Command titles: "Apply Hat" → "Apply Preset", "Save Hat from Active" → "Save Preset from Active"
• All user-facing messages and notifications updated to use "Preset" terminology

Documentation:

• Comprehensive updates to SETUP_GUIDE.md including workflow instructions and troubleshooting
• Technical documentation updates in SOFTWARE_ARCHITECTURE_SPECIFICATION.md
• Updated example catalog structure

File Structure:

Before: example-catalog/hats/
After:  example-catalog/presets/

Before: .vscode/copilot-hats.json
After:  .vscode/copilot-presets.json

Backward Compatibility

Command IDs are preserved (copilotCatalog.hats.*) to maintain compatibility with existing VS Code installations. Only user-facing titles and internal implementation use the new "Preset" terminology.

Impact

This change affects ~479 references throughout the codebase, providing consistent "Preset" terminology while maintaining all existing functionality. Users will see clearer, more intuitive language when working with collections of AI resources.

Fixes #15.

---

💬 Share your feedback on Copilot coding agent for the chance to win a $200 gift card! Click here to start the survey.