console: Enable e2e tests, previews, deploys and fix READMEs

[def-]

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[github-actions]

Thanks for opening this PR! Here are a few tips to help make the review process smooth for everyone.

PR title guidelines

• Use imperative mood: "Fix X" not "Fixed X" or "Fixes X"
• Be specific: "Fix panic in catalog sync when controller restarts" not "Fix bug" or "Update catalog code"
• Prefix with area if helpful: compute: , storage: , adapter: , sql:

Pre-merge checklist

• The PR title is descriptive and will make sense in the git log.
• This PR has adequate test coverage / QA involvement has been duly considered. (trigger-ci for additional test/nightly runs)
• If this PR includes major user-facing behavior changes, I have pinged the relevant PM to schedule a changelog post.
• This PR has an associated up-to-date design doc, is a design doc (template), or is sufficiently small to not require a design.
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• If this PR will require changes to cloud orchestration or tests, there is a companion cloud PR to account for those changes that is tagged with the release-blocker label (example).

[leedqin]

LGTM!