feat(github): add auto-conventional-commit hook with opencode integration

- Add prepare-commit-msg git hook that generates conventional commit messages
- Modularize fish configuration with separate conf.d files
- Convert configuration files from .text to .source format for structured data
- Add sops-nix SOPS configuration with explicit secret definitions
- Upgrade age identity to single key file management approach
- Add system activation script for age key management
- Generate .sops.yaml for SOPS creation rules
- Restructure README.md with improved table and cleaner formatting
- Refactor config files to use pkgs.formats.json/toml generators
- Implement YAML format for ashell and walker service configurations
- Update SSH config source to use sops secrets
- Convert zed and other config files to use structured .source format

system/programs/xdg.nix

@@ -17,10 +17,10 @@ in {
     enable = true;
     config = {
       common = {
-        default = ["gnome" "gtk"];
-        "org.freedesktop.impl.portal.ScreenCast" = "gnome";
-        "org.freedesktop.impl.portal.Screenshot" = "gnome";
-        "org.freedesktop.impl.portal.RemoteDesktop" = "gnome";
+        default = ["wlr" "gtk"];
+        "org.freedesktop.impl.portal.ScreenCast" = "wlr";
+        "org.freedesktop.impl.portal.Screenshot" = "wlr";
+        "org.freedesktop.impl.portal.RemoteDesktop" = "wlr";
         "org.freedesktop.impl.portal.Secret" = ["gnome-keyring"];
         "org.freedesktop.impl.portal.OpenURI" = "gtk";
         # FileChooser covers both OpenFile and SaveFile use-cases
@@ -29,7 +29,7 @@ in {
     };
     extraPortals = [
       pkgs.xdg-desktop-portal-gtk
-      pkgs.xdg-desktop-portal-gnome
+      pkgs.xdg-desktop-portal-wlr
       termfilechooser-niri
     ];
   };