build: add flathub files

flathub_stuff/io.github.fidele007.akkhara.desktop

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+[Desktop Entry]
+Name=Akkhara
+Comment=The only all-in-one dictionary app you need.
+Exec=akkhara %u
+Icon=io.github.fidele007.akkhara
+Terminal=false
+Type=Application
+Categories=Education;
+MimeType=x-scheme-handler/akkhara;

flathub_stuff/io.github.fidele007.akkhara.metainfo.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    Generator for metainfo & .desktop files:
+    https://www.freedesktop.org/software/appstream/metainfocreator/#/
+-->
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>io.github.fidele007.akkhara</id>
+
+  <name>Akkhara</name>
+  <summary>The only all-in-one dictionary app you need</summary>
+
+  <metadata_license>CC-BY-4.0</metadata_license>
+  <project_license>Beerware</project_license>
+  <developer id="io.github.fidele007">
+    <name>Force Fidele KIEN</name>
+  </developer>
+
+  <supports>
+    <control>pointing</control>
+    <control>keyboard</control>
+    <control>touch</control>
+  </supports>
+
+  <description>
+    <p>
+      Akkhara is a multilingual dictionary designed to enhance the way you explore and understand languages. Akkhara aims not just to simply be a dictionary; it&apos;s your linguistic companion, offering a seamless and enriching experience for language enthusiasts, students, professionals and casual users alike.
+    </p>
+    <p>
+      Some of the most highlighting features include:
+    </p>
+    <ul>
+      <li>Comprehensive word database</li>
+      <li>Multilingual support</li>
+      <li>Keyword search and in-definition word search</li>
+      <li>Approximative keyword search (fuzzy search)</li>
+      <li>Multi-dictionary search</li>
+      <li>Offline access</li>
+    </ul>
+  </description>
+
+  <launchable type="desktop-id">io.github.fidele007.akkhara.desktop</launchable>
+  <url type="homepage">https://fidele007.github.io/akkhara</url>
+  <url type="help">https://fidele007.github.io/akkhara/support</url>
+  <releases>
+    <release version="1.2.0" date="2024-04-11"/>
+  </releases>
+  <screenshots>
+    <screenshot type="default">
+      <image>https://dashboard.snapcraft.io/site_media/appmedia/2024/03/1._Multilingual_Dictionaries-1711643883.png</image>
+    </screenshot>
+    <screenshot>
+      <image>https://dashboard.snapcraft.io/site_media/appmedia/2024/03/2._Offline-1711643883.png</image>
+    </screenshot>
+    <screenshot>
+      <image>https://dashboard.snapcraft.io/site_media/appmedia/2024/03/3._Approximative_Search-1711643883.png</image>
+    </screenshot>
+  </screenshots>
+</component>