feat: add remove-on-error option

[dwisiswant0]

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Summary

#103

Proposed of changes

This PR fixes/implements the following bugs/features:

5958f6f feat: add remove-on-error option
5d79d06 refactor(proxymanager): handle Proxies index
8c03a07 feat: add errors pkg
ef207df feat(server): add proxy count log
d9a2f24 feat(proxymanager): add Count method
43dd5cd feat(proxymanager): add RemoveProxy method

How has this been tested?

Proof:

Closing issues

Fixes #103

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• I have followed the guidelines in our CONTRIBUTING.md document.
• I have written new tests for my changes.
• My changes successfully ran and pass tests locally.