Update metadata files (#19)

* Update AppStream data to modernize use of properties and add branding
  colors.
* Update screenshots so they should follow Flathub's guidelines, and
  display it running under KDE which is what is mainly used in
  melonDS's development on Linux.
* Update manifest to refine permissions use and update the SDK.

net.kuribo64.melonDS.appdata.xml

@@ -6,7 +6,10 @@
   <summary>Nintendo DS and DSi emulator</summary>
   <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-3.0</project_license>
-  <developer_name>Arisotura</developer_name>
+  <developer id="net.kuribo64">
+    <name>Arisotura</name>
+    <url>https://kuribo64.net</url>
+  </developer>
   <content_rating type="oars-1.0" />
   <description>
     <p>
@@ -23,23 +26,35 @@
       <li>Experimental emulation of the Nintendo DSi</li>
       <li>...and even more is planned!</li>
     </ul>
-    <p>
-      Note: BIOS and firmware files dumped from a real DS or DSi console are required to use melonDS.
-    </p>
   </description>
-  <url type="homepage">http://melonds.kuribo64.net/</url>
+  <url type="homepage">https://melonds.kuribo64.net/</url>
   <url type="bugtracker">https://github.com/melonDS-emu/melonDS/issues</url>
+  <url type="vcs-browser">https://github.com/melonDS-emu/melonDS</url>
+  <url type="donation">https://www.patreon.com/Arisotura</url>
   <screenshots>
-    <screenshot type="default">
-      <image>https://raw.githubusercontent.com/flathub/net.kuribo64.melonDS/master/screenshots/1.png</image>
+    <screenshot type="default" environment="plasma">
+      <image width="389" height="574" scale="1">https://raw.githubusercontent.com/flathub/net.kuribo64.melonDS/master/screenshots/1.png</image>
+      <caption>Nintendo DS emulation.</caption>
     </screenshot>
-    <screenshot>
-      <image>https://raw.githubusercontent.com/flathub/net.kuribo64.melonDS/master/screenshots/2.png</image>
+    <screenshot environment="plasma">
+      <image width="389" height="574" scale="1">https://raw.githubusercontent.com/flathub/net.kuribo64.melonDS/master/screenshots/2.png</image>
+      <caption>Nintendo DSi emulation.</caption>
     </screenshot>
-    <screenshot>
-      <image>https://raw.githubusercontent.com/flathub/net.kuribo64.melonDS/master/screenshots/3.png</image>
+    <screenshot environment="plasma">
+      <image width="901" height="574" scale="1">https://raw.githubusercontent.com/flathub/net.kuribo64.melonDS/master/screenshots/3.png</image>
+      <caption>High-resolution rendering and screen layouts.</caption>
     </screenshot>
   </screenshots>
+  <branding>
+    <color type="primary" scheme_preference="light">#ff554d</color>
+    <color type="primary" scheme_preference="dark">#ff554d</color>
+  </branding>
+  <supports>
+    <control>pointing</control>
+    <control>keyboard</control>
+    <control>touch</control>
+    <control>gamepad</control>
+  </supports>
   <releases>
     <release version="0.9.5" date="2022-11-03">
       <description>

net.kuribo64.melonDS.yml

@@ -1,6 +1,6 @@
 app-id: net.kuribo64.melonDS
 runtime: org.kde.Platform
-runtime-version: '6.6'
+runtime-version: '6.7'
 sdk: org.kde.Sdk
 command: melonDS
 cleanup:
@@ -8,8 +8,8 @@ cleanup:
   - "/lib/pkgconfig"
 finish-args:
   - "--share=ipc"
-  - "--socket=x11"
   - "--socket=wayland"
+  - "--socket=fallback-x11"
   - "--socket=pulseaudio"
   - "--share=network"
   - "--device=all"