Feature: UDP server stack

[unizippro]

Working server stack

• [x] Research creating send_to() with local ports given [Not possible]
• [x] Make sure closeing works including URCs handle removing closed incoming sockets
• [x] Redo debug messages
• [x] Fix lack of spin() calls

[codecov-commenter]

Codecov Report

Merging #43 (e69b760) into master (a3fa3fc) will decrease coverage by 0.26%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #43      +/-   ##
==========================================
- Coverage   14.58%   14.32%   -0.27%     
==========================================
  Files          48       48              
  Lines        1035     1047      +12     
  Branches      194      199       +5     
==========================================
- Hits          151      150       -1     
- Misses        799      812      +13     
  Partials       85       85              

Impacted Files	Coverage Δ
ublox-short-range/src/client.rs	0.00% <0.00%> (ø)
ublox-short-range/src/command/data_mode/mod.rs	0.00% <0.00%> (ø)
ublox-short-range/src/command/data_mode/types.rs	6.45% <ø> (ø)
ublox-short-range/src/command/edm/urc.rs	30.66% <ø> (-0.92%)	:arrow_down:
ublox-short-range/src/command/mod.rs	5.71% <0.00%> (ø)
ublox-short-range/src/command/network/types.rs	0.00% <0.00%> (ø)
ublox-short-range/src/error.rs	0.00% <ø> (ø)
ublox-short-range/src/wifi/mod.rs	0.00% <ø> (ø)
ublox-short-range/src/wifi/tcp_stack.rs	0.00% <ø> (ø)
ublox-short-range/src/wifi/udp_stack.rs	0.00% <0.00%> (ø)

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[MathiasKoch]

@unizippro Can you rebase this and make the CI pass?