feat: add Nord colorscheme for micro and track micro config in git

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -19,6 +19,11 @@
 !.config/
 !.config/yazi/
 !.config/yazi/yazi.toml
+!.config/micro/
+!.config/micro/settings.json
+!.config/micro/bindings.json
+!.config/micro/colorschemes/
+!.config/micro/colorschemes/nord-16.micro
 !signature.txt
 !LICENSE
 !README.md