Provide Gradle plugin

[Vladyslav-Kuksiuk]

This PR provides Gradle plugin, as more convenient way to use embed code in Gradle projects.

Resolvesthis issue.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.19%. Comparing base (62132b0) to head (d4573d4).
⚠️ Report is 16 commits behind head on master.

Additional details and impacted files

@@ Coverage Diff @@## master #116 +/- ##
===========================================
+ Coverage 82.37% 96.19% +13.81% 
===========================================
Files 43 43 Lines 2951 2945 -6 ===========================================
+ Hits 2431 2833 +402 + Misses 390 96 -294 + Partials 130 16 -114 

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[Vladyslav-Kuksiuk]

This plugin is moved to the own repo.