display warning for latest IDE versions on the loading screen

[akosyakov]

For latest versions like VS Code Insiders and EAP of JB products we should display a warning at all phases of the loading screen and provide an action to switch to restart a workspace with a corresponding stable version of a selected product.

Designs

Preparing	Running

See design specs.

[akosyakov]

@gtsiolis we will need a design for it.

cc @loujaybee

[loujaybee]

In addition to this, I think we need to review our documentation and copy-text to ensure that the expectations are set with users properly. If we have this flag on the workspace loading, I think copy text such as "what does this mean" which links to docs about the insiders and explains how it works / user expectations would also be useful.

[loujaybee]

@gtsiolis we will need a design for it.

@akosyakov - It would be nice if designed, but I wouldn't necessarily wait a design on this one as we could do something simple, draft an approach / PR and tweak based on feedback from @gtsiolis et al. We can also implement this incrementally, there are various places we can show this information, just starting with the workspace loading screens etc would help

[akosyakov]

Agree, to be clear it should be the same for EAP of JB products in sense of docs.

[loujaybee]

Also, this relates to: #7026.

In future I think we should consider having less stable features more clearly documented, e.g. Chrome Canary is a separate product / download so it's very clear. Or with the JetBrains EAP version's/products marked very clearly as EAP.

[loujaybee]

Created a companion issue in website docs: https://github.com/gitpod-io/website/issues/1700