refactor: split config to multiple modules

[Standing-Man]

fixed #604

Please briefly answer these questions:

• what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?)

the configurations are only in single module that doesn't handy to manage.

• what changes does this pull request make?

i organized these configurations into multiple modules.

• are there any non-obvious implications of these changes? (does it break compatibility with previous versions, etc)

[mergify]

@JianMinTang Convert your pr to draft since CI failed

[Standing-Man]

Hi @bsbds, when I use cargo audit to check for dependency vulnerabilities, it suggests that the rustls dependency needs to be updated to a newer version. Would you recommend updating it to the latest version to address potential security issues?

[codecov]

Codecov Report

Attention: Patch coverage is 82.35753% with 226 lines in your changes missing coverage. Please review.

Project coverage is 75.26%. Comparing base (e35b35a) to head (e8ab1c7).
Report is 332 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/xline/src/utils/args.rs	0.00%	98 Missing ⚠️
crates/utils/src/config/log.rs	68.11%	17 Missing and 5 partials ⚠️
crates/xlinectl/src/main.rs	0.00%	21 Missing ⚠️
crates/benchmark/src/runner.rs	0.00%	11 Missing ⚠️
crates/curp/src/rpc/reconnect.rs	86.76%	4 Missing and 5 partials ⚠️
crates/utils/src/config/metrics.rs	89.28%	5 Missing and 4 partials ⚠️
crates/utils/src/config/mod.rs	42.85%	7 Missing and 1 partial ⚠️
crates/curp/src/client/unary/mod.rs	44.44%	3 Missing and 2 partials ⚠️
crates/utils/src/config/server.rs	98.76%	1 Missing and 4 partials ⚠️
crates/curp/src/client/retry.rs	0.00%	0 Missing and 4 partials ⚠️
... and 14 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1025      +/-   ##
==========================================
- Coverage   75.55%   75.26%   -0.29%     
==========================================
  Files         180      204      +24     
  Lines       26938    28859    +1921     
  Branches    26938    28859    +1921     
==========================================
+ Hits        20353    21722    +1369     
- Misses       5366     5830     +464     
- Partials     1219     1307      +88     

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[Standing-Man]

WIP: refactor new methods to builder pattern! -> Done!

[mergify]

@Standing-Man You've modified the workflows. Please don't forget to update the .mergify.yml.