feat: infrastructure updates and documentation improvements

- Update Forgejo service configuration on grey-area
- Refine reverse-proxy network configuration
- Add README_new.md with enhanced documentation structure
- Update instruction.md with latest workflow guidelines
- Enhance plan.md with additional deployment considerations
- Complete PR template restructuring for professional tone

These changes improve service reliability and documentation clarity
while maintaining infrastructure consistency across all machines.

machines/grey-area/services/forgejo.nix

@@ -2,7 +2,7 @@
 {
   services.forgejo = {
     enable = true;
-    #user = "git";
+    # Use the default 'forgejo' user, not 'git'
   };
    
   services.forgejo.settings = {
@@ -16,6 +16,9 @@
       ROOT_URL = "https://git.geokkjer.eu";
       SSH_DOMAIN = "git.geokkjer.eu";
       SSH_PORT = 1337;
+      # Disable built-in SSH server, use system SSH instead
+      DISABLE_SSH = false;
+      START_SSH_SERVER = false;
     };
     repository = {
       ENABLE_PUSH_CREATE_USER = true;