[CDF-21480] 🏂Better build message

[doctrino]

Description

If not source modules are found:

And instead of the following when running the cdf-tk build

with this one

Checklist

• Tests added/updated.
• Run Demo Job Locally.
• Documentation updated.
• Changelogs updated in CHANGELOG.cdf-tk.md.
• Template changelogs updated in CHANGELOG.templates.md.
• Version bumped.
  _version.py and
  pyproject.toml per semantic versioning.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
7229	5620	78%	60%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
cognite_toolkit/_cdf_tk/commands/build.py	87%	🟢
cognite_toolkit/_cdf_tk/exceptions.py	80%	🟢
TOTAL	83%	🟢

updated for commit: a003138 by action🐍

[ronpal]

Not too crazy about the icons, if we introduce them here I'd like to use the same "style" everywhere. Also, rich has a Tree() class that I'm using in the interactive init, maybe you can use that to get the "folder tree" look?