add workflow dispatch to offliner-definition ci

[elfkuzco]

Changes

• add workflow dispatch event to manually trigger offliner definition update
• use base64 to pass offliner defintion to workflow call

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 4.86%. Comparing base (092ae82) to head (cdf4092).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #255   +/-   ##
=====================================
  Coverage   4.86%   4.86%           
=====================================
  Files          8       8           
  Lines       1130    1130           
  Branches     248     248           
=====================================
  Hits          55      55           
  Misses      1074    1074           
  Partials       1       1           

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