feat: add cts_login and cts_logout system events

[rrrrs09]

Description

Added cts_login and cts_logout system events which are sent by botx when user joins or leaves corporate server.

Checklist

• Linters and tests have passed
• I've written a changelog for PR change
• I'll make a release when PR is approved

[github-actions]

🚀 Deployed on https://61445e0e09d01ae863d2ca70--pybotx.netlify.app

[codecov-commenter]

Codecov Report

Merging #188 (d28a5b2) into master (7218332) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #188   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          274       274           
  Lines         6158      6175   +17     
  Branches       231       231           
=========================================
+ Hits          6158      6175   +17     

Impacted Files	Coverage Δ
...est_collector/test_decorators/test_system_event.py	100.00% <ø> (ø)
botx/bots/mixins/collecting/system_events.py	100.00% <100.00%> (ø)
botx/collecting/collectors/mixins/system_events.py	100.00% <100.00%> (ø)
botx/middlewares/ns.py	100.00% <100.00%> (ø)
botx/models/enums.py	100.00% <100.00%> (ø)
botx/models/events.py	100.00% <100.00%> (ø)
botx/models/messages/incoming_message.py	100.00% <100.00%> (ø)
botx/models/messages/message.py	100.00% <100.00%> (ø)
botx/testing/building/entites.py	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7218332...d28a5b2. Read the comment docs.