feat(multi-module): splitted to modules

[l3r8yJ]

ref: #13
ref: #26

@h1alexbel take a look, please

---

PR-Codex overview

This PR updates the Cargo workflows, adds Clap for argument parsing, and refactors code structure.

Detailed summary

• Updated Cargo workflows for Clippy and formatting checks
• Added Clap for argument parsing in the CLI
• Refactored code structure in main.rs and args.rs
• Updated licensing information in Cargo.toml files

The following files were skipped due to too many changes: server/src/lib.rs

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[h1alexbel]

@l3r8yJ take a look, please. BTW, maybe let's name module like that: fakehub-cli, fakehub-server, wdyt?

[h1alexbel]

should be server in order to be built by cargo

[l3r8yJ]

@h1alexbel does it make any sense to have fakehub- prefix inside of fakehub workspace? Don't get it, can you explain?

[h1alexbel]

@l3r8yJ let's drop the prefix then

[codecov]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 53.33%. Comparing base (73a71f9) to head (2c673fa).

Files	Patch %	Lines
cli/src/main.rs	0.00%	2 Missing ⚠️
server/src/lib.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #42       +/-   ##
===========================================
+ Coverage   22.58%   53.33%   +30.75%     
===========================================
  Files           3        4        +1     
  Lines          31       15       -16     
===========================================
+ Hits            7        8        +1     
+ Misses         24        7       -17     

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[l3r8yJ]

@h1alexbel take a look, please

[h1alexbel]

@l3r8yJ take a look, please

[h1alexbel]

@l3r8yJ

[h1alexbel]

@l3r8yJ let's stay with default clippy configuration for now

[l3r8yJ]

@h1alexbel in general PR is ready and you can review it, but I have small problem with build. While i'm trying to find WA, i've posted a question on SO, hope someone will answer sooner than I'll fix it by myself

[l3r8yJ]

@h1alexbel take a look, please