refactor: clarify HTTP reconnaissance plugin responsibilities

[deepsikha-dash]

Description

• Clarified the responsibilities of overlapping HTTP reconnaissance plugins.
• Updated httpx metadata to emphasize live host probing, status checks, title extraction, and technology fingerprinting.
• Updated website-recon-2 metadata to emphasize broader website reconnaissance and application stack identification.
• Updated PLUGINS.md catalog descriptions to clearly distinguish plugin ownership boundaries and intended use cases.
• No functional changes were made; this is a documentation/metadata clarification refactor.

Related Issues

Closes #545

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

How Has This Been Tested?

Manual verification:

Get-Content plugins/httpx/metadata.json
Get-Content plugins/website-recon-2/metadata.json
Get-Content PLUGINS.md | Select-String "httpx|Website Recon|HTTP Inspector"
git diff --stat

Verified that:

• httpx and website-recon-2 now have clearly differentiated descriptions.
• Plugin catalog reflects the updated responsibilities.
• No command templates, parsers, or runtime behavior were modified.

Checklist

• My code follows the code style of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.