add repo metadata

metadata/com.psiphon3.yml

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+Categories:
+  - Security
+  - Internet
+
+License: GPL-3.0
+
+AuthorName: Psiphon Inc.
+AuthorWebSite: https://psiphon.ca/
+
+SourceCode: https://github.com/Psiphon-Inc/psiphon-android
+IssueTracker: https://github.com/Psiphon-Inc/psiphon-android/issues
+
+AutoName: Psiphon
+
+Summary: Open-source censorship circumvention tool using VPN, SSH, and proxy technologies.
+
+Description: |
+  Psiphon is a free and open-source internet censorship
+  circumvention tool that helps users access blocked
+  content in restrictive environments.
+
+  It combines VPN, SSH, and HTTP proxy technologies
+  with traffic obfuscation techniques to bypass
+  filtering and network restrictions.
+
+  Unlike traditional anonymity networks, Psiphon
+  focuses primarily on censorship circumvention
+  rather than providing full anonymity.
+
+  The Android client source code is publicly
+  available under GPL-3.0 and related licenses,
+  enabling independent review and community
+  contribution.
+
+