feat: As an Issuer, I want my Module(s) to return a bool when run

[satyajeetkolhapure]

What does this PR do?

Related ticket

Fixes #182

Type of change

• Chore
• Bug fix
• New feature
• Documentation update

Check list

• Unit tests for any smart contract change
• Contracts and functions are documented

[codecov-commenter]

Codecov Report

Merging #195 (2a2ddf1) into dev (4aac392) will increase coverage by 0.16%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #195      +/-   ##
==========================================
+ Coverage   96.42%   96.59%   +0.16%     
==========================================
  Files          10       10              
  Lines         168      176       +8     
  Branches       40       40              
==========================================
+ Hits          162      170       +8     
  Misses          4        4              
  Partials        2        2              

Files Changed	Coverage Δ
src/interface/AbstractModule.sol	100.00% <ø> (ø)
src/ModuleRegistry.sol	96.29% <100.00%> (+1.05%)	⬆️
src/example/MsgSenderModule.sol	100.00% <100.00%> (ø)
src/example/PayableModule.sol	100.00% <100.00%> (ø)

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[alainncls]

Closing for now, but the branch remains protected