add custom js functions for templates

examples/custom-js-functions/blog-example.masonry

@@ -0,0 +1,31 @@
+entity User {
+  name: string required
+  email: string required unique
+  password: string required
+  bio: text
+  createdAt: timestamp
+  updatedAt: timestamp
+}
+
+entity Post {
+  title: string required
+  slug: string required unique
+  content: text required
+  published: boolean
+  authorId: uuid required relates to User as one via "authorId"
+  createdAt: timestamp
+  updatedAt: timestamp
+}
+
+entity Comment {
+  content: text required
+  authorId: uuid required relates to User as one via "authorId"
+  postId: uuid required relates to Post as one via "postId"
+  createdAt: timestamp
+}
+
+server BlogAPI {
+  host "localhost"
+  port 3000
+  database_url env "DATABASE_URL" default "postgres://localhost/blog"
+}