feat: added crypto libraries analysis and updated setup.md accordingly

[Brmstone]

Issue liée

close: #11

Description

New function within crypto_libs.py to let devs use shell commands and get the output.

Tests

Example code to use the functions is at the bottom of the crypto_libs file.

Changements

Added details in setup.md to explain how and from where to use the shell commands function.

Checklist

• tsc --noEmit passe sans erreur
• Le backend démarre (uvicorn main:app)
• Pas de secret / clé / token commité
• Les types TypeScript sont alignés sur les modèles Pydantic
• Les changements nécéssaires à la documentation ont été faits

[Copilot]

Pull request overview

This PR expands the agent’s S5 “crypto libraries” scanner by adding a small command-execution helper and initial Windows-focused detection for OpenSSL and SChannel, and documents the helper in SETUP.md.

Changes:

• Implemented run_command() plus OpenSSL executable discovery/version parsing and SChannel weak-protocol registry checks in agent/scanners/crypto_libs.py.
• Updated CryptoLibFinding to include PQ readiness and a details field.
• Added a short note in SETUP.md about reusing the new helper.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 7 comments.

File	Description
agent/scanners/crypto_libs.py	Adds command runner + OpenSSL/SChannel detection logic and expands the crypto libs finding model.
SETUP.md	Documents the new reusable run_command() helper.