Live log follow

[marcelldls]

closes #173 Process after #171 - The reason is because this continues using the same asyncio patterns and also extends the demo backend further

Adds polling to the logs to update them live + exposes controls to follow along

[codecov]

Codecov Report

Attention: Patch coverage is 94.44444% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.19%. Comparing base (e34309d) to head (8a179fb).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
src/edge_containers_cli/cmds/demo_commands.py	91.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #175      +/-   ##
==========================================
+ Coverage   82.00%   82.19%   +0.18%     
==========================================
  Files          16       16              
  Lines        1006     1022      +16     
==========================================
+ Hits          825      840      +15     
- Misses        181      182       +1     

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