Based on cesium sandcastle url-param way of sharing code snippet

Can be a cloud.js, metadata.json or copc file, loaded in a standalone potree app via loadProject from potree

Edited tests for each asset type present in this PR.
For each action/link added in this PR, rather check if substring present in `this.asset.href.toLowerCase().includes('.pmtiles')` or simply `this.component.filename.toLowerCase().endsWith('.pmtiles')`

 - Fix copcviewer can show for ept.json
 - modify default potree attributeName to elevation rather than rgba since it's always available

Since component.filename does not always exist

More immersive, fullscreen view of the tileset

Add links actions for OGC 3d-tiles (geofox.ai or cesium sandcastle) and protomaps

Added asset and link actions for OGC3dTiles, geoparquet.info, potree.org, pmtiles.io

The `load_potree_project_from_urlparam.html` has been updated to parse more urlparams, simplified the action by passing a JSON-parseable array of one potree dataset url rather than a complete potree project - which would allow for measurements, volumes, cam pos etc.
Also added a comment to https://potree.org/potree/examples/load_potree_project_from_urlparam.html which should be live once PR is merged by potree maintaining team

see f3d.app PR merged for parsing model url and extension: f3d-app/f3d#1596
`https://f3d.app/web/#model=${modelUrl}`