multiline input blocks

[miniscruff]

Closes #93
Closes #385

Check the following

• Keep 100% code coverage
• Be properly formatted
• Documentation changes are included
• Include a change file if expected

Additional context
Waiting on an update from cqroot/prompt for validations.
Still need to write tests.

FYI @bephinix and @sheldonhull both of you requested this.

[trunk-io]

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[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (acb805a) 100.00% compared to head (7149959) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #465   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           14        14           
  Lines         1726      1740   +14     
=========================================
+ Hits          1726      1740   +14     

Impacted Files	Coverage Δ
core/config.go	100.00% <100.00%> (ø)
core/custom.go	100.00% <100.00%> (ø)

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[bephinix]

@miniscruff Thx for the PR! This makes it possible for me to use Changie for even more projects. 💯