new Code block support

[ConnectGrid]

Support for Code blocks. Haven't yet fully tested it, but seems to cover the bases. Let me know if anything is missing. I'll continue to test and will make any suggested changes.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes are missing coverage. Please review.

Project coverage is 80.47%. Comparing base (38151af) to head (577cb39).

Files	Patch %	Lines
src/BlockRenderer/CodeBlockRenderer.php	0.00%	5 Missing :warning:
src/Block/CodeBlock.php	0.00%	2 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##                1.x      #18      +/-   ##
============================================
- Coverage     82.41%   80.47%   -1.95%     
- Complexity       83       86       +3     
============================================
  Files            29       31       +2     
  Lines           290      297       +7     
============================================
  Hits            239      239              
- Misses           51       58       +7     

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