feat: As a user, I want to have an example ERC-1271 module

[Builddddder]

What does this PR do?

Related ticket

Fixes #247

Type of change

• Chore
• Bug fix
• New feature
• Documentation update

Check list

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

[alainncls]

Hey @Builddddder , that's great! 👍
Can you run pnpm run prettier:write at the root of the project to benefit from a perfect linting?
Also, on the test part of the ERC1271Module, do you think it's possible to cover a bit more code? Or do you see any issue with that?

[codecov-commenter]

Codecov Report

Merging #314 (62937f4) into dev (c877819) will decrease coverage by 1.92%.
Report is 2 commits behind head on dev.
The diff coverage is 76.92%.

@@            Coverage Diff             @@
##              dev     #314      +/-   ##
==========================================
- Coverage   93.43%   91.51%   -1.92%     
==========================================
  Files          12       13       +1     
  Lines         198      224      +26     
  Branches       46       53       +7     
==========================================
+ Hits          185      205      +20     
- Misses          8       10       +2     
- Partials        5        9       +4     

Files	Coverage Δ
contracts/src/examples/modules/ERC1271Module.sol	76.92% <76.92%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[Builddddder]

@alainncls OK, I am fixing the left problems.