Added validation for config and updated renderer details in config documentation.

[KunalJadhav5]

Tested Code for below config details

daemon:
  port: 80000000
  host: localhost
logging:
  level: inf
reports:
  format: pd
  renderer: easyprint
  outputDir:~/.temp_unal

Errors:

(venv) daxa-kunal@kunal-ubu-test-20240215-155301:~/kunal_pebblo/pebblo$ pebblo --config /home/daxa-kunal/kunal_pebblo/pebblo/pebblo/app/config/config.yaml
  0%|                                                                                                                                                                                                                                                   | 0/10 [00:00<?, ?it/s]Error: Invalid port '80000000'. Port must be between 1 and 65535.
Error: Unsupported logLevel 'INF' specified in the configuration
Error: Unsupported format 'pd' specified in the configuration
Error: Unsupported renderer 'easyprint' specified in the configuration
Error: Output directory '~/.temp_unal' specified for the reports does not exist
  0%|                                                                                                                                                                                                                                                   | 0/10 [00:00<?, ?it/s]
(venv) daxa-kunal@kunal-ubu-test-20240215-155301:~/kunal_pebblo/pebblo$

#Local Output for testcases

Launching pytest with arguments 
C:\Users\KunalJadhav\Desktop\Kunal_Desktop\pebblo_config\pebblo\tests\app\config\test_config_validation.py --no-header --no-summary -q in C:\Users\KunalJadhav\Desktop\Kunal_Desktop\pebblo_config\pebblo\tests\app\config

============================= test session starts =============================
collecting ... collected 4 items

test_config_validation.py::test_daemon_config_validate PASSED            [ 25%]
test_config_validation.py::test_logging_config_validate PASSED           [ 50%]
test_config_validation.py::test_reports_config_validate PASSED           [ 75%]
test_config_validation.py::test_validate_config PASSED                   [100%]

============================== 4 passed in 0.06s ==============================

[shreyas-damle]

Please add unit tests.

[Raj725]

@KunalJadhav5 pls fix the failing tests

[Raj725]

LGTM