tools/publish_release.sh: create the Gitea release, upload and verify

.gitignore

@@ -18,3 +18,6 @@ Thumbs.db
 
 # Editor
 *.tmp
+
+# Cloudflare wrangler cache (tools/site deploys)
+.wrangler/

assets/audio/CREDITS.md

@@ -0,0 +1,27 @@
+# Audio credits
+
+Everything here is CC0 (public domain): free to use, change and ship, with
+no attribution required. Credit is given anyway.
+
+## Kenney (CC0)
+`sfx/kenney/` holds sounds from three of Kenney's packs, renamed:
+- **RPG Audio**: creaks, doors, cloth, leather, knife, metal clicks
+- **Impact Sounds**: wood, mining, plank, punch and soft impacts; footsteps
+  on grass, snow, wood and concrete
+- **Interface Sounds**: open, close, tick and confirmation chimes
+
+https://kenney.nl/assets/rpg-audio,
+https://kenney.nl/assets/impact-sounds,
+https://kenney.nl/assets/interface-sounds:
+"License: (Creative Commons Zero, CC0)
+http://creativecommons.org/publicdomain/zero/1.0/". Thank you, Kenney.
+
+Which file is which is listed in `KENNEY` in `tools/audio/make_audio.py`,
+which also re-copies them (`--kenney <folder with the unzipped packs>`).
+
+## Emberwild's own (CC0)
+`music/`, `ambience/` and `sfx/synth/` are synthesised from scratch by
+`tools/audio/make_audio.py` (no samples): the five music tracks (calm,
+night, storm, danger, boss), the birds, crickets and fire crackle, and the
+swings, eating, splashes, the fishing reel and bite, the bow, the hurt thump
+and death. Released under CC0 like the rest of this folder.