feat[extractors-users]: add personal repo download toggle

[jbristow]

Summary of Change

• Github Users Extractor now allows repo collection to be turned off.

Before Review

• Unit Tests are Added/Updated and meet at-least 85% coverage criteria for that feature

Before Merge

• Ran/Functionally Tested in Dev Environment
• Documentation Is Updated (Where Appropriate)

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
nodestream_github
plugin.py	4	1	75%	6
repos.py	94	3	97%	37, 81, 85
teams.py	34	1	97%	63
users.py	26	1	96%	33
nodestream_github/client
githubclient.py	252	34	87%	93–94, 99–100, 193, 211, 247, 264, 330–331, 358–359, 421–422, 442–443, 478–479, 500–501, 513–514, 534–535, 544–546, 573–574, 594–595, 605–607
TOTAL	590	40	93%

Tests	Skipped	Failures	Errors	Time
36	0 💤	0 ❌	0 🔥	1.940s ⏱️