✨ Added Webhook related endpoints

[trag1c]

Adds

Client.get_webhook
Channel.get_webhooks
Guild.get_webhooks
WebhookCompatibility enum
Webhook.edit
Webhook.delete
Webhook.execute
Webhook.execute_github
Webhook.execute_slack
Webhook.get_message
Webhook.delete_mesage
Webhook.edit_message
Webhook.from_id

Improvements

Parameter formatting in Channel.edit

Check off the following

• I have tested my changes with the current requirements
• My Code follows the pep8 code style.

[codecov]

Codecov Report

Merging #281 (a733185) into main (c80d274) will not change coverage.
The diff coverage is n/a.

❗ Current head a733185 differs from pull request most recent head bd11b64. Consider uploading reports for the commit bd11b64 to get more accurate results

@@           Coverage Diff           @@
##             main     #281   +/-   ##
=======================================
  Coverage   90.00%   90.00%           
=======================================
  Files           9        9           
  Lines         100      100           
=======================================
  Hits           90       90           
  Misses         10       10           

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[Enderchief]

<3