feat(schema): allow usage of custom schemas

[da-z]

Allows projects to use custom schemas, that may not be foreseen by this project (or do not classify as browser extension necessarily).

Fixes #135

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.17%. Comparing base (fcbd06f) to head (9a37506).
Report is 5 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #139      +/-   ##
==========================================
+ Coverage   94.22%   95.17%   +0.95%     
==========================================
  Files           3        3              
  Lines         225      228       +3     
==========================================
+ Hits          212      217       +5     
+ Misses         12       11       -1     
+ Partials        1        0       -1     

Flag	Coverage Δ
go-	95.17% <100.00%> (+0.95%)	⬆️
go-1.18	95.17% <100.00%> (+0.95%)	⬆️
go-1.19	95.17% <100.00%> (+0.95%)	⬆️
go-1.20	95.17% <100.00%> (+0.95%)	⬆️
go-1.21	95.17% <100.00%> (+0.95%)	⬆️
go-1.22	95.17% <100.00%> (+0.95%)	⬆️
macos-latest	95.17% <100.00%> (+0.95%)	⬆️
ubuntu-latest	95.17% <100.00%> (+0.95%)	⬆️

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