Add missing post.json filter files to 13 -only alternate directories

[Copilot]

13 alternate directories ending in -only were missing post.json filter configuration files, causing these variants to skip domain filtering applied by other alternates.

Changes

Added post.json to each affected directory with standard filter list:

{
  "filters": [
    "allegro",
    "bilet",
    "olx.pl",
    "npost",
    "blogspot.com",
    ".ipfs.",
    "c752sa3k9"
  ]
}

Affected directories:

• fakenews-gambling-only
• fakenews-gambling-porn-only
• fakenews-gambling-social-only
• fakenews-porn-only
• fakenews-porn-social-only
• fakenews-social-only
• gambling-only
• gambling-porn-only
• gambling-porn-social-only
• gambling-social-only
• porn-only
• porn-social-only
• social-only

These filters are read by updateHostsFile.py:955-978 during hosts file generation to exclude matching domains, ensuring parity with non--only variants.

Original prompt

Pull request: https://github.com/Benazzo/hosts/pull/3/files

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