feat: extract cms from mp/cms — initial libreshop/cms

Source moved verbatim from mp/cms/ on 2026-04-29; mp was the first
concrete adapter consuming the libreshop toolkit. Builds and publishes
git.librete.ch/libreshop/cms on every main / v* push via the standard
.gitea/workflows/build.yml shared across libreshop components.

config/admin.ts

@@ -0,0 +1,22 @@
+export default ({ env }) => ({
+	auth: {
+		secret: env("ADMIN_JWT_SECRET")
+	},
+	apiToken: {
+		salt: env("API_TOKEN_SALT")
+	},
+	transfer: {
+		token: {
+			salt: env("TRANSFER_TOKEN_SALT")
+		}
+	},
+	autoOpen: false,
+	// watchIgnoreFiles: [
+	//   "**/controllers/**",
+	//   "**/database/**",
+	// ],
+	flags: {
+		nps: false,
+		promoteEE: false
+	}
+});