feat: add devfile walkthrough extension to built-ins

[vitaliy-guliy]

What does this PR do?

Adds vscode devfile extension to built-ins.

! Please note my comment in PR devfile/vscode-walkthrough-extension#3 (comment)

There is a regression in VS Code.
I will provide a small test extension and file the issue to the VS Code.

What issues does this PR fix?

eclipse-che/che#21606

How to test this PR?

• create a workspace with https://github.com/vitaliy-guliy/recommended-extensions-sample/tree/test-pr-326
• open Welcome, go to Get Started with the Devfile

[github-actions]

Click here to review and test in web IDE:

[github-actions]

Pull Request Dev image published:
👉 quay.io/che-incubator-pull-requests/che-code-dev:pr-326-dev-amd64

[github-actions]

Pull Request Dev image published:
👉 quay.io/che-incubator-pull-requests/che-code-dev:pr-326-dev-amd64

[github-actions]

Pull Request Che-Code image published:
👉 quay.io/che-incubator-pull-requests/che-code:pr-326-amd64

[github-actions]

Pull Request Dev image published:
👉 quay.io/che-incubator-pull-requests/che-code-dev:pr-326-dev-amd64

[github-actions]

Pull Request Dev image published:
👉 quay.io/che-incubator-pull-requests/che-code-dev:pr-326-dev-amd64

[github-actions]

Pull Request Che-Code image published:
👉 quay.io/che-incubator-pull-requests/che-code:pr-326-amd64

[ibuziuk]

would be nice to understand why latest does not work

[vitaliy-guliy]

yes, using latest here would be the best solution

added comment here eclipse-che/che#21606 (comment)

[l0rd]

Can we make the Devfile walkthrough appear in the welcome page? Ideally as the first Walkthrough.

[vitaliy-guliy]

Can we make the Devfile walkthrough appear in the welcome page? Ideally as the first Walkthrough.

I wanted, but have not found a way how to do it. VS Code plugin API does not provide the ability to change item order. It seems VS Code displays the walkthrouhs due to order in which the extensions are loaded/added to the vscode.

[devstudio-release]

Build 3.13 :: code_3.x/1270: Console, Changes, Git Data

[devstudio-release]

Build 3.12 :: code_3.12/15: Console, Changes, Git Data

[devstudio-release]

Build 3.13 :: sync-to-downstream_3.x/6179: Console, Changes, Git Data

[devstudio-release]

Build 3.12 :: sync-to-downstream_3.12/53: Console, Changes, Git Data

[devstudio-release]

Build 3.13 :: get-sources-rhpkg-container-build_3.x/6091: Console, Changes, Git Data

[devstudio-release]

Build 3.12 :: get-sources-rhpkg-container-build_3.12/51: Console, Changes, Git Data

[devstudio-release]

Build 3.13 :: get-sources-rhpkg-container-build_3.x/6091:

code : 3.x :: Failed in 58688859 : code-rhel8-3.13-10
FAILURE: 1158568 - osbs.osbs_http - DEBUG - cleaning up==> 58688859:DEFAULT:osbs-build.log: <==; copied to quay

[devstudio-release]

Build 3.12 :: get-sources-rhpkg-container-build_3.12/51:

code : 3.12 :: Failed in 58688860 : code-rhel8-3.12-61
FAILURE: 1158575 - osbs.osbs_http - DEBUG - cleaning up==> 58688860:DEFAULT:osbs-build.log: <==; copied to quay