Project tree view and creation (#203)

* Implement creating and importing new projects

* Add downloading a zip of a project

* Project validation (WIP)

* Add project side panel, remove project pages

* Project file saving

* Add file tree actions to rename and delete

* Fix file creation auto focus

* Add button to save file from menu

* Add project creation

* Fix specificity on version switcher button

* Update default version to 1.19

* List project files by type, remember project and delete project

package.json

@@ -24,6 +24,7 @@
     "@mcschema/java-1.18.2": "^0.1.10",
     "@mcschema/java-1.19": "^0.1.27",
     "@mcschema/locales": "^0.1.64",
+    "@zip.js/zip.js": "^2.4.5",
     "brace": "^0.11.1",
     "buffer": "^6.0.3",
     "comment-json": "^4.1.1",