add dev / build scripts (#2551)

Add scripts for dev/build docs

### Change Type

- [x] `internal` — Any other changes that don't affect the published
package[^2]

package.json

@@ -40,9 +40,11 @@
 		"dev": "LAZYREPO_PRETTY_OUTPUT=0 lazy run dev --filter='apps/examples' --filter='packages/tldraw'",
 		"dev-vscode": "code ./apps/vscode/extension && lazy run dev --filter='apps/vscode/{extension,editor}'",
 		"dev-app": "LAZYREPO_PRETTY_OUTPUT=0 lazy run dev --filter='apps/{dotcom,dotcom-asset-upload,dotcom-worker}' --filter='packages/tldraw'",
+		"dev-docs": "LAZYREPO_PRETTY_OUTPUT=0 lazy run dev --filter='apps/docs'",
 		"dev-huppy": "LAZYREPO_PRETTY_OUTPUT=0 lazy run dev --filter 'apps/huppy'",
 		"build": "lazy build",
 		"build-app": "lazy run build --filter 'apps/dotcom'",
+		"build-docs": "lazy run build --filter 'apps/docs'",
 		"build-types": "lazy inherit",
 		"build-api": "lazy build-api",
 		"build-package": "lazy build-package",