Add Git Credential Manager for HTTPS auth to Gitea.

modules/apps.nix

@@ -90,6 +90,7 @@ in
     wpsoffice-cn
 
     git
+    git-credential-manager
     gcc
     gnumake
     binutils

modules/common.nix

@@ -69,7 +69,18 @@
   };
 
   programs.nix-ld.enable = true;
-  programs.git.enable = true;
+  programs.git = {
+    enable = true;
+    config = {
+      credential = {
+        helper = "manager";
+        credentialStore = "cache";
+        "https://git.whcself.xyz" = {
+          provider = "generic";
+        };
+      };
+    };
+  };
 
   # Clash Verge Rev
   programs.clash-verge = {