Unit Testing

[0xSwapFeeder]

Description

The current state of the project is lacking some unit test and showcase of it in the readme.
Each lib and servers need to be tested.

Add a coverage badge in the readme and automate it.

Note:
If the crate to test is already tested enough you can skip it, just mark the PR as not to be worked on and close it.

Definition of Done

Automation:

• Coverage badge #19

Libs:

• Test lib ast-extractor #20
• Test lib code-actions #21
• Test lib lsp-utils #22
• Test lib foundry-wrapper #23
• Test lib path-utils #24
• Test lib solidhunter #25

Servers:

• Test server code-actions #26
• Test server foundry-compiler #27
• Test server linter #28
• Test server slither #29
• Test server tests-positions #30

Code of Conduct

• I agree to follow this project's Code of Conduct