feat: move templates into AFFiNE (#5750)

Related to https://github.com/toeverything/blocksuite/pull/6156

### Change
Move the edgeless templates to AFFiNE. All templates are stored as zip files. Run `node build-edgeless.mjs` in `@affine/templates` to generate JSON-format templates and importing script. The template will be generated automatically during building and dev (`yarn dev`).

packages/frontend/templates/package.json

@@ -4,10 +4,14 @@
   "sideEffect": false,
   "version": "0.12.0",
   "scripts": {
-    "postinstall": "node ./build.mjs"
+    "postinstall": "node ./build.mjs && node ./build-edgeless.mjs"
   },
   "type": "module",
   "exports": {
-    ".": "./templates.gen.ts"
+    ".": "./templates.gen.ts",
+    "./edgeless": "./edgeless-templates.gen.ts"
+  },
+  "devDependencies": {
+    "jszip": "^3.10.1"
   }
 }