Exclude company-branded packages (Masa, Ctrip, Alipay, Senparc) from the ranking

[Copilot]

Packages published under company brand namespaces (Masa.*, Com.Ctrip.*, Alipay.*, Senparc.*) are corporate products, not individual community OSS projects, and should not appear in the ranking.

projects.json

• Removed 117 company packages across all four namespaces
• Removed masastack and JeffreySu from nuget_owners (exclusively published company-branded packages)
• Added permanent exclusion lists to prevent re-detection on future runs:

  "excluded_nuget_ids": ["BlazorComponent", "PaySharp.Alipay"],
  "excluded_nuget_id_prefixes": ["Alipay.", "Com.Ctrip.", "Masa.", "Senparc."]

scripts/update_ranking.py

• Reads excluded_nuget_ids (exact match) and excluded_nuget_id_prefixes (prefix match) from config
• Exclusion checks run before tracked/candidate dedup so company packages are filtered unconditionally regardless of discovery order

README.md

• Regenerated ranking: 120 packages (down from 237)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Use Copilot to automatically detect new project from China .NET community</issue_title>
<issue_description>- Help me detect new projects

• Add projects to this ranking list automatically. Rank by total package download rate on nuget.org
• Total package download rate on nuget.org must be over 20k</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Use Copilot to automatically detect new project from China .NET community #8

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