feat(udp): Added UDP server

[flc1125]

No description provided.

[what-the-diff]

PR Summary

• Updated .gitignore File
  The .gitignore file has been modified to ignore 'example' directories, which suggests that developers are no longer supposed to provide '_example' code within the repository.

• Added New Dependencies in go.mod and go.sum
  New dependencies have been added to the project's go.mod and go.sum files, which indicates that new third-party Go packages were introduced into the software. These packages (golang.org/x/sync v0.3.0 and google.golang.org/genproto) will provide additional functionalities to our software.

• Added UDP Server Related Files
  Two new files, udp/README.md and udp/server.go, have been added. The README.md file typically provides an explanation or documentation about the associated code files or directories. In this case, it likely contains useful information about how the UDP server operates. The server.go file appears to contain the source code for the UDP server, which allows the application to deal with User Datagram Protocol requests. This indicates a new feature or service has been added to our software that will enhance its ability to communicate over the network via the UDP protocol.

[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (e4b6231) 69.80% compared to head (15feab2) 70.88%.

Files	Patch %	Lines
udp/server.go	83.33%	6 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
+ Coverage   69.80%   70.88%   +1.07%     
==========================================
  Files          21       22       +1     
  Lines         626      680      +54     
==========================================
+ Hits          437      482      +45     
- Misses        176      182       +6     
- Partials       13       16       +3     

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