feat: add -S flag to skip *.pth evaluation during environment analysis

[jkowalleck]

Description

Add an option cyclonex environment -S to prevent evaluation of pth files.

-S    Do not implicitly import site during Python path detection.
      Prevents evaluation of `*.pth` files, but may lead to incomplete component detection.

fixes #1031

AI Tool Disclosure

• My contribution does not include any AI-generated content
• My contribution includes AI-generated content, as disclosed below:
  • AI Tools: [e.g. GitHub CoPilot, ChatGPT, JetBrains Junie etc.]
  • LLMs and versions: [e.g. GPT-4.1, Claude Haiku 4.5, Gemini 2.5 Pro etc.]
  • Prompts: [Summarize the key prompts or instructions given to the AI tools]

Affirmation

• My code follows the CONTRIBUTING.md guidelines

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.06% (target: -1.00%)	✅ 92.86% (target: 80.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (ecf8768)	1143	1109	97.03%
Head commit (71e08d6)	1152 (+9)	1117 (+8)	96.96% (-0.06%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1032)	14	13	92.86%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[read-the-docs-community]

Documentation build overview

📚 CycloneDX Python SBOM Tool | 🛠️ Build #32036130 | 📁 Comparing 71e08d6 against latest (ecf8768)

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Show files changed (1 files in total): 📝 1 modified | ➕ 0 added | ➖ 0 deleted

File	Status
usage.html	📝 modified