Implement missing activation events

[tsmaeder]

Feature Description:

There are a bunch of plugin activation events we don't support yet:

• [ ] onProfile,
• [ ] onWalkthrough
• [ ] onEditSession ....

[tsmaeder]

This issue was started based on https://github.com/eclipse-theia/theia/issues/14003. Feel free to extend with more known unimplemented ones.

[tsmaeder]

The only place I could find to see what events there really are is in the packags.json code assist of the "activationEvent" tag in package.json in VS Code.

[NHAS]

• [ ] onTunnel
• [ ] onOpenExternalUri

Also seem to be ones missing

[rschnekenbu]

as reported by https://github.com/eclipse-theia/theia/issues/13051#issuecomment-2665496473, the list of unsupported activation events has been updated