react: Add Router hook & fix typescript issues (#68)

* add rollup watch command, add pnpm lockfile

* wait for react

* add WIP patcher, window hook, and webpack

* fix typescript, fix React, lint, add pnpm to gitignore

* actually fix react

* show frontend JS errors in console

* cleanup

* Add Router hook

* Remove console.log

* Expose routerHook in createPluginAPI

Co-authored-by: Jonas Dellinger <jonas@dellinger.dev>

frontend/tsconfig.json

@@ -3,7 +3,8 @@
     "outDir": "dist",
     "module": "ESNext",
     "target": "ES2020",
-    "jsx": "react-jsx",
+    "jsx": "react",
+    "jsxFactory": "window.SP_REACT.createElement",
     "declaration": false,
     "moduleResolution": "node",
     "noUnusedLocals": true,