feat: implement driver Start command

[ajcasagrande]

It seems like GitHub wants to do some funky things with the change detection because of my reordering of functions. Here is a breakdown of the changes:

• Moved a chunk of code from Initialize into Start
• Added locking and clearing of clients on Stop()
• Moved non-driver functions to util.go along with their tests
• re-ordered the functions in driver.go to make more sense. (initialize, start, stop all together, etc.)

PR Checklist

Please check if your PR fulfills the following requirements:

• [X] I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• [X] I am not introducing a new dependency (add notes below if you are)
• [N/A] I have added unit tests for the new feature or bug fix (if not, why?)
• [X] I have fully tested (add details below) this the new feature or bug fix (if not, why?)
• [N/A] I have opened a PR for the related docs change (if not, why?)

Testing Instructions

New Dependency Instructions (If applicable)

Fixes #308

[codecov-commenter]

Codecov Report

Merging #343 (c65c0a2) into main (3c68e39) will decrease coverage by 0.08%. The diff coverage is 20.40%.

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@@            Coverage Diff             @@
##             main     #343      +/-   ##
==========================================
- Coverage   33.25%   33.18%   -0.08%     
==========================================
  Files          18       19       +1     
  Lines        1798     1802       +4     
==========================================
  Hits          598      598              
- Misses       1134     1138       +4     
  Partials       66       66              

Impacted Files	Coverage Δ
internal/driver/driver.go	12.13% <4.28%> (-4.76%)	:arrow_down:
internal/driver/util.go	60.71% <60.71%> (ø)