doc: clarify verbose option help text

[cpz-research]

Closes #907

[Copilot]

Pull request overview

Note

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Updates user-facing descriptions of the --verbose/-v option to clearly document the supported verbosity levels (0–2) and their meanings.

Changes:

• Revised Click option help text for --verbose to explicitly describe levels 0/1/2.
• Updated the build() docstring to match the new verbosity description.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/_pytask/parameters.py	Clarifies CLI help text for the verbosity option by enumerating supported levels.
src/_pytask/build.py	Aligns build() parameter documentation with the updated verbosity semantics.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.14%. Comparing base (ad3680e) to head (9a71421).
⚠️ Report is 309 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #908      +/-   ##
==========================================
- Coverage   97.80%   95.14%   -2.67%     
==========================================
  Files         106      125      +19     
  Lines        8710    11694    +2984     
==========================================
+ Hits         8519    11126    +2607     
- Misses        191      568     +377     

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