Created How to release a new version (markdown)

How-to-release-a-new-version.md

@@ -0,0 +1,33 @@
+The process for maintainers.
+
+1.  Try to give any downstreams (Web,  iPad) a heads-up in advance.
+1.  If minor version: remove all version guards.
+1.  Update versions in Rogue.h, Info.plist.
+1.  Run `tools/bullet-points changes/*.md`, fix formatting, rephrase, and add entry to CHANGELOG.md.
+1.  Delete changes files.
+1.  Push gha-build branch.
+1.  Download artifacts from gha-build Action. Test with `tools/gha-release` or equivalent.
+1.  Make version tag and push it.
+1.  Make release on GitHub.
+
+        {summary}
+        
+        <details>
+        <summary>Changes</summary>
+        
+        {changelog}
+        
+        </details>
+1.  Post to /r/brogueforum.
+
+        Adventurers,
+
+        An update for Brogue CE is now available!
+
+        [Download for Windows, Mac, and Linux](https://github.com/tmewett/BrogueCE/releases)
+        
+        {summary}
+        
+        {changelog}
+1.  Post to roguelikes Discord.
+1.  If minor version: cross-post to /r/roguelikes.