Feat: add PacketAddr support to Trojan

[AkinoKaede]

Reopen #1919

[codecov-commenter]

Codecov Report

Base: 39.37% // Head: 39.20% // Decreases project coverage by -0.17% ⚠️

Coverage data is based on head (4a1d466) compared to base (f8ac919).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2225      +/-   ##
==========================================
- Coverage   39.37%   39.20%   -0.17%     
==========================================
  Files         616      609       -7     
  Lines       36738    36706      -32     
==========================================
- Hits        14465    14390      -75     
- Misses      20688    20732      +44     
+ Partials     1585     1584       -1     

Impacted Files	Coverage Δ
proxy/trojan/client.go	1.00% <0.00%> (-0.37%)	⬇️
proxy/trojan/config.pb.go	12.50% <0.00%> (-0.28%)	⬇️
proxy/trojan/protocol.go	44.82% <0.00%> (-5.18%)	⬇️
proxy/trojan/server.go	0.37% <0.00%> (-0.02%)	⬇️
proxy/trojan/simplified/config.go	3.84% <ø> (ø)
proxy/trojan/simplified/config.pb.go	18.86% <0.00%> (-0.74%)	⬇️
app/proxyman/outbound/errors.generated.go	0.00% <0.00%> (-100.00%)	⬇️
common/task/task.go	88.88% <0.00%> (-7.41%)	⬇️
testing/servers/tcp/tcp.go	81.81% <0.00%> (-5.46%)	⬇️
testing/scenarios/common.go	75.00% <0.00%> (-4.29%)	⬇️
... and 13 more

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[xiaokangwang]

No issue was discovered. It is ready to be merged. Thanks for your work.