Add fastlane metadata for F-Droid (#4121)

* Add fastlane metadata

* fixup! Add fastlane metadata

* hoedown full_description.txt

* Remove title heading 1

.github/workflows/fastlane.yml

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+name: Validate Fastlane metadata
+
+on:
+  workflow_dispatch:
+  push:
+      branches: [ "master" ]
+  pull_request:
+      branches: [ "master" ]
+
+jobs:
+  go:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Validate Fastlane Supply Metadata
+        uses: ashutoshgngwr/validate-fastlane-supply-metadata@v2.0.0

fastlane/metadata/android/en-US/full_description.txt

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+<p>A V2Ray client for Android, support <a href="https://github.com/XTLS/Xray-core">Xray core</a> and <a href="https://github.com/v2fly/v2ray-core">v2fly core</a></p>
+
+<h3>Telegram Channel</h3>
+
+<p><a href="https://t.me/github_2dust">github_2dust</a></p>
+
+<h3>Usage</h3>
+
+<h4>Geoip and Geosite</h4>
+
+<ul>
+<li>geoip.dat and geosite.dat files are in <code>Android/data/com.v2ray.ang/files/assets</code> (path may differ on some Android device)</li>
+<li>download feature will get enhanced version in this <a href="https://github.com/Loyalsoldier/v2ray-rules-dat">repo</a> (Note it need a working proxy)</li>
+<li>latest official <a href="https://github.com/v2fly/domain-list-community">domain list</a> and <a href="https://github.com/v2fly/geoip">ip list</a> can be imported manually</li>
+<li>possible to use third party dat file in the same folder, like <a href="https://guide.v2fly.org/routing/sitedata.html#%E5%A4%96%E7%BD%AE%E7%9A%84%E5%9F%9F%E5%90%8D%E6%96%87%E4%BB%B6">h2y</a></li>
+</ul>
+
+<h3>More in our <a href="https://github.com/2dust/v2rayNG/wiki">wiki</a></h3>
+
+<h3>Development guide</h3>
+
+<p>Android project under V2rayNG folder can be compiled directly in Android Studio, or using Gradle wrapper. But the v2ray core inside the aar is (probably) outdated.
+The aar can be compiled from the Golang project <a href="https://github.com/2dust/AndroidLibV2rayLite">AndroidLibV2rayLite</a> or <a href="https://github.com/2dust/AndroidLibXrayLite">AndroidLibXrayLite</a>.
+For a quick start, read guide for <a href="https://github.com/golang/go/wiki/Mobile">Go Mobile</a> and <a href="https://tutorialedge.net/golang/makefiles-for-go-developers/">Makefiles for Go Developers</a></p>
+
+<p>v2rayNG can run on Android Emulators. For WSA, VPN permission need to be granted via
+<code>appops set [package name] ACTIVATE_VPN allow</code></p>

fastlane/metadata/android/en-US/short_description.txt

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+A V2Ray client for Android, support Xray core and v2fly core

fastlane/metadata/android/en-US/title.txt

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+v2rayNG