remove PlutoCombineHTL module and corresponding dependencies

[disberd]

This PR removes the PlutoCombineHTL submodule from PlutoDevMacros.

This now lives in its own repository though it's not registered.

This removal reduces the codebase and removes some dependencies in an effort to make PlutoDevMacros depends on as few packages as possible.

Some dependencies (i.e. MacroTools, Random, InteractiveUtils and Markdown) are still there due to a lingering presence of the notebook defining the @plutoinclude macro which will be removed in a next PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.50%. Comparing base (03eec7c) to head (5c21dcb).

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #52      +/-   ##
==========================================
+ Coverage   99.43%   99.50%   +0.07%     
==========================================
  Files          16       11       -5     
  Lines        1234      813     -421     
==========================================
- Hits         1227      809     -418     
+ Misses          7        4       -3     

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[disberd]

Here is the gif for the hide_this_log function