Add r3f doc for community components

docs/getting-started/examples.mdx

@@ -337,6 +337,81 @@ nav: 3
   </li>
 </Grid>
 
+## R3F community components 
+
+### Repos and docs
+
+This page showcases some React Three Fiber/r3f community components that have not been merged to the [drei](http://drei.docs.pmnd.rs) components collection or to another [pmndrs](https://github.com/pmndrs) project. If you'd like to list new community components, please make a PR to [this doc](https://github.com/pmndrs/react-three-fiber/tree/master/docs/getting-started/community-r3f-components.mdx) file. 
+
+#### Data sources
+
+ - Luma Labs [Gaussian Splats](https://cdn-luma.com/public/lumalabs.ai/luma-web-library/0.2/fefe154/index.html#react-three-fiber) renderer doc with demos
+ - [NASA-AMMOS/3DTilesRendererJS](https://github.com/NASA-AMMOS/3DTilesRendererJS/) (r3f [wip readme](https://github.com/NASA-AMMOS/3DTilesRendererJS/tree/r3f-dev/src/r3f/README.md)) repo with doc
+ - [NYTimes/three-loader-3dtiles](https://github.com/nytimes/three-loader-3dtiles/blob/dev/examples/r3f/src/index.tsx) and [doc](https://nytimes.github.io/three-loader-3dtiles/)
+
+#### Renderers & frameworks
+
+ - [Looking Glass](https://docs.lookingglassfactory.com/developer-tools/webxr/react-three-fiber) doc and demos
+ - [Theatre-js](https://github.com/theatre-js/theatre) repo and [doc](https://www.theatrejs.com/docs/latest)
+
+#### Materials
+
+ - [FarazzShaikh/CustomShaderMaterial](https://github.com/FarazzShaikh/THREE-CustomShaderMaterial)
+ - [spite/THREE.MeshLine](https://github.com/spite/THREE.MeshLine)
+ - [ektogamat/R3F-Ultimate-Lens-Flare](https://github.com/ektogamat/R3F-Ultimate-Lens-Flare)
+ - [troika-three-text](https://github.com/protectwise/troika/tree/main/packages/troika-three-text)
+
+#### Utilities
+
+ - [utsuboco/r3f-perf](https://github.com/utsuboco/r3f-perf)
+
+
+### Codesandboxes and demos
+
+<Grid cols={3}>
+  <li>
+    [NASA-AMMOS/3DTilesRendererJS](https://github.com/NASA-AMMOS/3DTilesRendererJS)
+
+    [<Img src="https://raw.githubusercontent.com/NASA-AMMOS/3DTilesRendererJS/master/images/header-mars.png" alt="3DTilesRendererJS r3f demo" className="aspect-[16/9] object-cover"  width="1763" height="926" />](https://nasa-ammos.github.io/3DTilesRendererJS/example/bundle/r3fDemo.html)
+  </li>
+  <li>
+    [Luma Gaussian Splats](https://cdn-luma.com/public/lumalabs.ai/luma-web-library/0.2/fefe154/index.html#react-three-fiber)
+    <Codesandbox id="h2fkgq" />
+  </li>
+  <li>
+    [NYTimes/three-loader-3dtiles](https://github.com/nytimes/three-loader-3dtiles/blob/dev/examples/r3f/src/index.tsx)
+
+    [<Img src="https://rd.nytimes.com/static/1ffcbe7f02d6168aecebdb7a84929dcf/1b9fc/7579e21f-3af0-46bb-a073-28c4a97594f9_Demo4.jpg" alt="three-loader-3dtiles r3f demo" className="aspect-[16/9] object-cover"  width="1763" height="926" />](https://nytimes.github.io/three-loader-3dtiles/dist/web/examples/demos/realitycapture/)
+  </li>
+  <li>
+    [Looking Glass](https://docs.lookingglassfactory.com/developer-tools/webxr/react-three-fiber)
+    <Codesandbox id="g97yzp" /> 
+  </li>
+  <li>
+    [Theatre-js](https://github.com/theatre-js/theatre)
+    <Codesandbox id="c6m9lj" screenshot_url="https://c6m9lj-3000.csb.app/thumbnail.jpg"/>
+  </li>
+  <li>
+    [FarazzShaikh/THREE-CustomShaderMaterial](https://github.com/FarazzShaikh/THREE-CustomShaderMaterial)
+
+    [<Img src="https://external-preview.redd.it/yZVlNuTjk4jZU0dOcq3mtuQggLy04PmyOHsHTtoHaB0.png?format=pjpg&auto=webp&s=f65fcd78763ea8a6abd24773d767fa4012afa2f0" alt="THREE-CustomShaderMaterial r3f demo" className="aspect-[16/9] object-cover"  width="1763" height="926" />](https://farazzshaikh.github.io/THREE-CustomShaderMaterial/#/caustics)
+  </li>
+  <li>
+    [utsuboco/r3f-perf](https://github.com/utsuboco/r3f-perf)
+    <Codesandbox id="ykfpwf" />
+  </li>
+  <li>
+    [spite/THREE.MeshLine](https://github.com/spite/THREE.MeshLine)
+    <Codesandbox id="lsvkqk" />
+  </li>
+  <li>
+    [ektogamat/R3F-Ultimate-Lens-Flare](https://github.com/ektogamat/R3F-Ultimate-Lens-Flare)
+
+    [<Img src="https://raw.githubusercontent.com/ektogamat/R3F-Ultimate-Lens-Flare/main/thumbnail.png" alt="R3F-Ultimate-Lens-Flare demo" className="aspect-[16/9] object-cover"  width="1763" height="926" />](https://ultimate-lens-flare.vercel.app/)
+  </li>
+</Grid>
+
+
 ## Game prototypes
 
 <Grid>