Add Forgejo theme and homepage

themes/theme-forgejo-light.css

@@ -0,0 +1,23 @@
+/*
+ * theme-forgejo-light.css (custom override)
+ * ─────────────────────────────────────────────────────────────────────────
+ * The built-in Forgejo light palette (snapshot: _base-forgejo-light.css)
+ * plus the shared neumorphic/soft-UI layer.
+ *
+ * Overrides the built-in theme so the soft look applies to anyone who picked
+ * "forgejo-light". Palette frozen from Forgejo 15.0.0.
+ */
+
+@import url("./_base-forgejo-light.css");
+@import url("./theme-neumorphism.css");
+
+:root {
+  color-scheme: light;
+  --is-dark-theme: false;
+
+  --nm-shadow-dark: rgba(0, 0, 0, 0.16);
+  --nm-shadow-light: rgba(255, 255, 255, 0.95);
+  --nm-divider-color: rgba(0, 0, 0, 0.08);
+  --nm-radius: 14px;
+  --nm-radius-sm: 10px;
+}