build(appdata): add more data and apply linter recommendations

This is a preparation for Flatpak packaging in Flathub.

To align with Flathub's quality guidelines as possible, we still need to
define brand colors and have better screenshots (preferably with
different languages, not just English).

Read:
    - https://docs.flathub.org/docs/for-app-authors/metainfo-guidelines/quality-guidelines#brand-colors
    - https://docs.flathub.org/docs/for-app-authors/metainfo-guidelines/quality-guidelines#screenshots

Author: zefr0x

data/org.pwmt.zathura.appdata.xml.in

@@ -4,8 +4,11 @@
   <id>org.pwmt.zathura</id>
   <metadata_license>CC0-1.0</metadata_license>
   <project_license>Zlib</project_license>
+  <developer id="org.pwmt">
+    <name>pwmt</name>
+  </developer>
   <name>Zathura</name>
-  <summary>A minimalistic document viewer</summary>
+  <summary>Minimalistic document viewer</summary>
   <description>
     <p>
       Zathura is a highly customizable and functional document viewer. It
@@ -27,25 +30,39 @@
   <launchable type="desktop-id">org.pwmt.zathura.desktop</launchable>
   <url type="homepage">https://pwmt.org/projects/zathura</url>
   <url type="bugtracker">https://github.com/pwmt/zathura/issues</url>
+  <url type="donation">https://pwmt.org/help/donate</url>
+  <url type="contact">https://pwmt.org/contact</url>
+  <url type="translate">https://github.com/pwmt/zathura/tree/develop/po</url>
+  <url type="vcs-browser">https://github.com/pwmt/zathura</url>
+  <url type="help">https://pwmt.org/projects/zathura/documentation/</url>
   <screenshots>
     <screenshot type="default">
       <image>https://pwmt.org/static/img/zathura-cover.png</image>
+      <caption>Reading a PDF file</caption>
     </screenshot>
     <screenshot>
       <image>https://pwmt.org/static/img/zathura-completion.png</image>
+      <caption>Opening a file with the `open` command</caption>
     </screenshot>
     <screenshot>
       <image>https://pwmt.org/static/img/zathura-follow.png</image>
+      <caption>Following links</caption>
     </screenshot>
     <screenshot>
       <image>https://pwmt.org/static/img/zathura-bookmarks.png</image>
+      <caption>Listing and selecting bookmakrs</caption>
     </screenshot>
   </screenshots>
   <translation type="gettext">zathura</translation>
   <provides>
     <binary>zathura</binary>
   </provides>
-  <content_rating type="oars-1.0" />
+  <content_rating type="oars-1.1" />
+  <recommends>
+    <control>keyboard</control>
+    <control>pointing</control>
+    <control>touch</control>
+  </recommends>
   <releases>
     <release version="0.5.12" date="2025-07-03">
       <description>
@@ -131,12 +148,12 @@
     </release>
     <release version="0.5.1" date="2022-09-09">
       <description>
-        <p>seccomp: Make glibc fallback to clone instead of using clone3</p>
+        <p>`seccomp`: Make glibc fallback to clone instead of using clone3</p>
       </description>
     </release>
     <release version="0.5.0" date="2022-09-08">
       <description>
-        <p>magic is now a required dependency</p>
+        <p>`magic` is now a required dependency</p>
         <p>Various fixes and improvements</p>
       </description>
     </release>
@@ -524,7 +541,7 @@
         <p>Configureable modes</p>
         <p>Smooth scrolling</p>
         <p>Extended statusbar string manipulation</p>
-        <p>function</p>
+        <p>`function`</p>
         <p>Strip executable</p>
         <p>Updated manpage</p>
       </description>
@@ -536,10 +553,10 @@
         <p>Updated the behaviour of sc_scroll</p>
         <p>Half/Full-page scrolling</p>
         <p>Check document health in sc_reload</p>
-        <p>tabbed support</p>
+        <p>`tabbed` support</p>
         <p>Define look with the set function</p>
         <p>Implemented map function</p>
-        <p>zathurarc file</p>
+        <p>`zathurarc` file</p>
         <p>Prevent buffer overflow in realpath</p>
         <p>Strip executeable</p>
         <p>Key evaluation when buffer is not empty</p>
@@ -595,7 +612,7 @@
         <p>Marker support</p>
         <p>Highlight search results</p>
         <p>Buffered commands</p>
-        <p>set Function</p>
+        <p>`set` Function</p>
         <p>Revert video function</p>
         <p>Command completion</p>
       </description>