Adding InSp3ctor tool for public buckets.

[aarushikool]

This PR adds InSp3ctor as a new prerecon tool to enable cloud bucket discovery and enumeration in Mantis.
Changes made:

• Integrated InSp3ctor for discovering public and redirected Amazon S3 cloud storage buckets.
• Added ANSI escape code stripping to correctly parse the tool's colored terminal output.
• Introduced extract_bucket_url() to filter only true positive results (public/redirect) and ignore non-existent buckets.
• Added identify_cloud_provider() to automatically detect the cloud provider from the bucket URL (Amazon S3, Azure, DigitalOcean, Google Cloud).
• Results are stored in extended_assets_collection under a new cloud_bucket asset type with a unique hash-based ID to prevent duplicates.
• Added ASSET_TYPE_CLOUD_BUCKET constant to constants.py
  InSp3ctor will complement the existing FindCDN and Naabu prerecon tools by adding cloud storage enumeration to the reconnaissance workflow.