feat(onboarding): improve checklist wording and target project visibi…

[jul-dan]

Summary

Issue: QOV-2072

• Reword onboarding checklist steps for clarity: cluster step becomes "Install Qovery" with clearer option labels ("Create a new cluster (Qovery Managed)", "Local Machine"), and the service step now redirects users to their environment overview instead of dropping them straight into the service creation catalog.
• Add a new "Spec to Prod" use case to the "What are you looking to do?" onboarding step, and widen the "ask for RDE access" end-of-onboarding CTA to trigger on any of the three AI-related use cases (non-tech team, AI workflows, spec-to-prod).
• Always show the "Target project" field in the create/clone environment modal (disabled in create mode, editable in clone mode) so users know which project their environment will land in.

Screenshots / Recordings

Testing

• Changes tested locally in the relevant Console's pages and Storybooks
• yarn test or yarn test -u (if you need to regenerate snapshots)
• yarn format
• yarn lint

PR Checklist

• I followed naming, styling, and TypeScript rules (see .cursor/rules)
• I performed a self-review (diff inspected, dead code removed)
• I titled the PR using Conventional Commits with a scope when possible (e.g. feat(service): add new Terraform service) - required for semantic-release
• I only kept necessary comments, written in English (watch for useless AI comments)
• I involved a designer to validate UI changes if I am not a designer
• I covered new business logic with tests (unit)
• I confirmed CI is green (Codecov red can be accepted)
• I reviewed and executed locally any AI-assisted code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 41.89%. Comparing base (fd6bc48) to head (9fab9d9).
⚠️ Report is 7 commits behind head on staging.

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #2806      +/-   ##
===========================================
- Coverage    47.88%   41.89%   -5.99%     
===========================================
  Files         1250      257     -993     
  Lines        26652     7378   -19274     
  Branches      7760     2256    -5504     
===========================================
- Hits         12761     3091    -9670     
+ Misses       11693     3750    -7943     
+ Partials      2198      537    -1661     

Flag	Coverage Δ
unittests	41.89% <100.00%> (-5.99%)	⬇️

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