Fencer

* Add missing dependencies to pyproject.toml

* Add test runner for authorized endpoints access test
* Improve schema parsing and component resolving
* Refactor test case logic into its own module
* Add more SQL injection strategies
* Generate granular SQL injection attacks per operation per parameter

* Improve test logs during execution
* Save failed test cases to .fencer folder
* Add test report at the end of execution
* Add parsing for YAML specs

* First iteration of fencer