feat: add calculate_distance_meters to estimate distance to a bluetooth device

[Jc2k]

Add's the calculate_distance_meters helper from ibeacon_ble here so we can reuse it with out types of devices.

See home-assistant/core#99465.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.02% 🎉

Comparison is base (4634dfb) 99.44% compared to head (9f4e6c6) 99.47%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #28      +/-   ##
==========================================
+ Coverage   99.44%   99.47%   +0.02%     
==========================================
  Files           3        4       +1     
  Lines         180      190      +10     
  Branches       25       27       +2     
==========================================
+ Hits          179      189      +10     
  Misses          1        1              

Files Changed	Coverage Δ
src/bluetooth_data_tools/__init__.py	100.00% <100.00%> (ø)
src/bluetooth_data_tools/distance.py	100.00% <100.00%> (ø)

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[bdraco]

LGTM after lint fixed

[bdraco]

Only the title actually matters since its going to squash