Dynamically generate help text + rename test files

[alysivji]

What does this do

• generate help text based on what features the workspace has enabled
• only commands for features that are enabled are active
• rename test files

Why are we doing this

Improve user experience

How should this be tested

Added tests around this functionality

Migrations

n/a

Dependencies

n/a

Callouts

n/a

[codecov-commenter]

Codecov Report

Merging #311 into master will decrease coverage by 0.14%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master     #311      +/-   ##
==========================================
- Coverage   92.41%   92.26%   -0.15%     
==========================================
  Files          70       70              
  Lines        2253     2287      +34     
==========================================
+ Hits         2082     2110      +28     
- Misses        171      177       +6     

Impacted Files	Coverage Δ
...usy_beaver/apps/slack_integration/slash_command.py	90.35% <70.00%> (-4.55%)	⬇️
...eaver/apps/slack_integration/event_subscription.py	96.29% <100.00%> (+0.04%)	⬆️
busy_beaver/apps/slack_integration/interactors.py	100.00% <100.00%> (ø)

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