Report the installed package version from the CLI

[dereuromark]

Release blocker

bin/djot --version currently reports only dev because this library correctly omits a hardcoded Composer version. Read the version Composer derives from the installed tag instead, retaining the source-tree fallback.

This makes the 0.1.33 package report 0.1.33 without adding a hardcoded version that must be maintained manually.

Validation

• php bin/djot --version reports dev-master in this source checkout.
• Regression test rejects bare dev and unknown.
• 2,819 tests / 18,472 assertions pass.
• Coding standards, PHPStan, strict Composer validation, and advisory audit pass.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.19%. Comparing base (fab953f) to head (42c1b02).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #279   +/-   ##
=========================================
  Coverage     92.19%   92.19%           
  Complexity     3967     3967           
=========================================
  Files           111      111           
  Lines         11066    11066           
=========================================
  Hits          10202    10202           
  Misses          864      864           

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