Move to slog logr implementation:

[jacobweinstock]

Description

slog is one less import and by default provides improved time format and file, function, and line number attributes.

Why is this needed

Fixes: #

How Has This Been Tested?

How are existing users impacted? What migration steps/scripts do we need?

Checklist:

I have:

• updated the documentation and/or roadmap (if required)
• added unit or e2e tests
• provided instructions on how to upgrade

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 23 lines in your changes missing coverage. Please review.

Project coverage is 49%. Comparing base (24e97c2) to head (f3a2ddf).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/smee/main.go	0%	23 Missing ⚠️

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #552   +/-   ##
===================================
- Coverage    49%    49%   -1%     
===================================
  Files        27     27           
  Lines      2935   2951   +16     
===================================
- Hits       1464   1461    -3     
- Misses     1429   1447   +18     
- Partials     42     43    +1     

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