FVC snapshot command

[albireox]

This PR is an initial step in a larger change that would take an FVC measurement after a collision detected and provide information about the likelihood of that collision being real.

These changes refactor the fvc loop command, moving the logic to a separate function. It also allows to use any BaseConfiguration object with the FVC class. Finally, it introduces an fvc snapshot command that creates a configuration from the current positions and takes the equivalent of an fvc loop --no-apply.

[codecov]

Codecov Report

Merging #186 (d8093b4) into main (25226f5) will decrease coverage by 0.1%.
The diff coverage is 23.0%.

❗ Current head d8093b4 differs from pull request most recent head c616713. Consider uploading reports for the commit c616713 to get more accurate results

@@           Coverage Diff           @@
##            main    #186     +/-   ##
=======================================
- Coverage   45.7%   45.6%   -0.0%     
=======================================
  Files         42      42             
  Lines       6148    6165     +17     
  Branches    1201    1202      +1     
=======================================
+ Hits        2805    2811      +6     
- Misses      3064    3075     +11     
  Partials     279     279             

Impacted Files	Coverage Δ
python/jaeger/fvc.py	23.2% <20.0%> (+0.5%)	⬆️
python/jaeger/actor/commands/fvc.py	24.7% <23.4%> (+0.4%)	⬆️

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