Enable f-strings for fun

[Cictrone]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Life, Liberty, and the pursuit of f"reedom

[hulto]

Let's F-inf go!!!
🤌🤌

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (a4671b3) 71.18% compared to head (dba617c) 71.24%.

Files	Patch %	Lines
implants/lib/eldritch/src/pivot/port_scan_impl.rs	90.00%	1 Missing ⚠️
implants/lib/eldritch/src/sys/shell_impl.rs	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #612      +/-   ##
==========================================
+ Coverage   71.18%   71.24%   +0.06%     
==========================================
  Files         168      168              
  Lines       11199    11224      +25     
==========================================
+ Hits         7972     7997      +25     
  Misses       3023     3023              
  Partials      204      204              

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