feat: add missing project files and fix architecture compliance

- Add LICENSE file (MIT)
- Add CONTRIBUTING.md with generator-first workflow guidelines
- Add Makefile with comprehensive development commands
- Add .editorconfig for consistent code formatting
- Add CHANGELOG.md for version tracking
- Remove inconsistent non-variant files that bypassed generator architecture
- Fix installation script to use variant-specific paths (prevent config overwriting)

terminals/ghostty/everforest-dark-medium.conf

@@ -0,0 +1,32 @@
+# Everforest theme for Ghostty
+# Generated from template - do not edit manually
+
+# General colors
+background = #2f383e
+foreground = #d3c6aa
+
+# Selection colors
+selection-background = #374247
+selection-foreground = #d3c6aa
+
+# Cursor colors
+cursor-color = #d3c6aa
+cursor-text = #2f383e
+
+# Color palette
+palette = 0=#2f383e
+palette = 1=#e67e80
+palette = 2=#a7c080
+palette = 3=#dbbc7f
+palette = 4=#7fbbb3
+palette = 5=#d699b6
+palette = 6=#83c092
+palette = 7=#d3c6aa
+palette = 8=#7a8478
+palette = 9=#e67e80
+palette = 10=#a7c080
+palette = 11=#dbbc7f
+palette = 12=#7fbbb3
+palette = 13=#d699b6
+palette = 14=#83c092
+palette = 15=#d3c6aa