Add release notes to appdata

Author: kevingranade

data/xdg/org.cataclysmdda.CataclysmDDA.appdata.xml

@@ -71,7 +71,56 @@
     <binary>cataclysm-tiles</binary>
   </provides>
   <releases>
-    <release version="0.H" type="development" date="2024-07-22" />
+    <release version="0.H" date="2024-07-22">
+      <description>
+        <p>
+          I'm proud to announce that the Cataclysm: Dark Days Ahead 0.H "Hebert" release is here!
+          With an 11 month Gestation (before forking) and a 10 month delivery (after forking),
+          we once again utterly failed to limit the scope of work with a release, the 0.H
+          development process has been the longest in many releases, packing in thousands of new
+          pieces of content, massive performance improvements, and IMO more polish than we've ever
+          seen in a DDA release. A huge group of about 450 people contributed to this release,
+          about 200 for the first time this release. All together we changed about 12 million
+          lines of code and data across about 5,500 files, adding about 5,000 game entities in the
+          core game and another 5,000 in mods. This time around we handled the release process
+          differently, following a more traditional process where we called 0.H "feature complete"
+          all the way back in January of 2024 and moved it to a dedicated fork for bugfixing.
+          Since then we've created new infrastructure to manage the stabilization process,
+          fixed many many bugs, and backported a limited number of key features from the
+          experimental branch. Whether this new approach really hits its stride is yet to be seen,
+          but I'm hopeful next cycle can be shorter now that the infrastructure is in place.
+        </p>
+        <p>
+          Feature wise, we've seen the addition of biomes, where traveling East now leads to larger
+          cities to a point, then the lands ends in an ocean. Travelling West leads to sparser human
+          settlements and more wilderness. Portal storms now spawn and move around on the map, you
+          can either hunker down or move to avoid them (or chase them if you're so inclined), and an
+          unprecedented amount of new and interesting content has been added to their chaotic mix.
+          After years of hard work, 3D vision has finally reached a point where we're ok to turn it
+          on by default: bugs are few and far between now, and thanks to this feature we can see a
+          lot more interactivity between Z levels. Our accidental bespoke scripting framework, the
+          EOC system, has been greatly expanded and many, many features have been overhauled to take
+          advantage of it. This allows an enormous flexibility of events in both mainline and mods
+          without ever touching a compiler. Multiple new boss-tier encounters have been added for
+          late game challenge, though I don't want to spoil them here. Now you will know why you
+          fear the night. The number of proficiencies has increased greatly for this version, roughly
+          doubling the number of proficiencies you can learn, all with unique effects.  We've seen
+          an expansion of the proficiency framework in some of the directions desired initially,
+          allowing proficiencies to confer more than just crafting bonuses. Practice actions have also
+          filled out, providing a smooth path for skill gain instead of grinding crafting or other
+          activities. This version should see an end to repeatedly crafting and uncrafting a simple
+          object to grind skills, allowing you to automate the process to represent your character
+          studying and practicing, spending character time but not so much player time. You'll also
+          notice other savings in player time, we've found a number of places to speed up key code and
+          drastically reduce waiting times, making for a much more responsive experience.
+        </p>
+	<p>
+          Try it out. It's the best DDA yet.
+	</p>
+      </description>
+      <url type="details">
+        https://github.com/CleverRaven/Cataclysm-DDA/tree/0.H-branch/data/changelog.txt</url>
+    </release>
     <release version="0.G Gaiman" date="2023-03-01">
       <description>
         <p>