Implement TcpFullStack with server capabilities, and TcpListeners

[MathiasKoch]

TODO

• Correctly close & cleanup sockets
• Add example usage
• Unit tests
• Minor error handling

Fixes #13

[codecov-commenter]

Codecov Report

Merging #25 (3cd4e96) into master (e8cb2d9) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #25      +/-   ##
==========================================
+ Coverage   16.44%   16.46%   +0.01%     
==========================================
  Files          46       46              
  Lines         997      996       -1     
  Branches      190      191       +1     
==========================================
  Hits          164      164              
+ Misses        747      746       -1     
  Partials       86       86              

Impacted Files	Coverage Δ
ublox-short-range/src/client.rs	0.00% <ø> (ø)
ublox-short-range/src/command/data_mode/mod.rs	0.00% <ø> (ø)
...lox-short-range/src/command/data_mode/responses.rs	0.00% <0.00%> (ø)
ublox-short-range/src/command/data_mode/types.rs	0.00% <0.00%> (ø)

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