docs: add next js with app router example (#7552)

* move the existing example to with-script-in-browser

* Add example with next js app router

* disable ssr for excalidraw client comp

* typo

* update output dir

* don't include nextjs example in tsconfig

* remove meta.json

* lint

* remove example.ts

* port

* move the examples outside packages and use the deps as workspaces in examples

* update gitignore

* fix example

* update path of build dir

* fix

* fix scripts

* try local path

* fix

* update commands

* fix

* fix

* fix script

* skip ts

* disable ts

* add vercel.json

* install

* update tsconfig

* fix lint

* remove console.log

* lets see if this works

* revert

* remove ts nocheck

* add types and some utils in nextjs example

* fix types

* updatw example and remove nextjs dynamic syntax so we don't import excal twice

* move both examples to workspaces and create generic example to be used by browser and next js both

* copy the static assets to nextjs

* fix ts config

* render custom menu items

* fix custom footer

* fix types in browser example

* use regular imports for importing excal and import it using dynamic next js in app router instead

* Add example for pages router

* fix css discrepancies

* fix css

* configure output dir

* fix

* fix css

* rename to with-nextjs

* move components to examples/excalidraw/components

examples/excalidraw/with-nextjs/.gitignore

@@ -0,0 +1,36 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+.yarn/install-state.gz
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts