Add Phylax Credible Layer Developer Docs for Linea

### Organization

Phylax Systems

### Contributor name/alias

czepluch

### Affiliation to organization

Team Member

### Contributor role

Lead DevRel Eng

### Nature of issue

- [x] Add documentation about our product
- [ ] Improve or update existing documentation
- [ ] Correct errors
- [ ] Other (please specify below:)

### Specify Other

_No response_