feat: As a user, I want to have an example schema checker module

[Builddddder]

What does this PR do?

Related ticket

Fixes #267

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 #316 (414df97) into dev (484c24d) will increase coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev     #316      +/-   ##
==========================================
+ Coverage   91.51%   91.66%   +0.14%     
==========================================
  Files          13       14       +1     
  Lines         224      228       +4     
  Branches       53       54       +1     
==========================================
+ Hits          205      209       +4     
  Misses         10       10              
  Partials        9        9              

Files	Coverage Δ
...racts/src/examples/modules/SchemaCheckerModule.sol	100.00% <100.00%> (ø)

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