Token auth

[smekuria1]

Adds #505

This is my attempt to add basic simple Auth Token Authentication.
It works in a similar way to Basic Auth but can be expanded to be able to use JWTs( I can add that but it requires adding more libraries which i didn't want to do)

To-do:

• Implement the configuration option for token-based authentication (AuthToken field).
• Create an environment variable (DAGU_AUTH_TOKEN) for token management.
• Implement middleware for token-based authentication.
• Test that the Web UI remains unaffected by these changes.
  When either Basic Auth or Auth Token is turned on the WebUI doesn't work which i believe is a feature since the webui is not configured to send tokens or credentials
• Adjust basic auth middleware to recognize and skip requests with valid tokens.
• Add docs for auth Token authentication

Wrong Auth Token

Correct Auth Token

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b07ebc5) 74.25% compared to head (78601c7) 74.25%.
Report is 1 commits behind head on main.

❗ Current head 78601c7 differs from pull request most recent head af40f47. Consider uploading reports for the commit af40f47 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #508   +/-   ##
=======================================
  Coverage   74.25%   74.25%           
=======================================
  Files          40       40           
  Lines        3604     3604           
=======================================
  Hits         2676     2676           
  Misses        789      789           
  Partials      139      139           

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[yottahmd]

Thanks a lot for submitting the PR! I have added a few comment, I appreciate if you could make some small adjustments when you have time.

[smekuria1]

Hi, I have implemented the changes your requested. Thank you so much for your instructions and if there is anything i need to add or change let me know.

ps i ran into some weird git issues so i apologize for some of the unnecessary commits

[yottahmd]

Looks good to me. Thank you so much for the great work!