refactor(mod,lib)!: reorganize the whole module structure

[hasundue]

• refactor(lib/semver): use namespace for const for better documentation
• docs(lib/dependency): add a missing closer for a code block
• refactor(lib): reorganize Dependency and its methods

[codecov[bot]]

Codecov Report

Attention: 25 lines in your changes are missing coverage. Please review.

Comparison is base (20d9f28) 84.29% compared to head (88e97f7) 86.34%.

Files	Patch %	Lines
lib/testing.ts	63.33%	10 Missing and 1 partial :warning:
lib/dependency.ts	92.77%	6 Missing :warning:
lib/path.ts	93.02%	3 Missing :warning:
lib/update.ts	91.66%	3 Missing :warning:
lib/file.ts	95.12%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #92 +/- ## ========================================== + Coverage 84.29% 86.34% +2.04% ========================================== Files 20 20 Lines 828 791 -37 Branches 109 116 +7 ========================================== - Hits 698 683 -15 + Misses 129 107 -22 Partials 1 1 ```

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