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/

README.md

@@ -53,6 +53,15 @@ Export Templates). The version number is `application/short_version` in
   `Emberwild.exe --headless -- --server` (Windows). Saves and settings live in
   the same user folder as a copy run from source.
 
+## Trailer and download page
+```bash
+tools/trailer/make_trailer.sh   # build/Emberwild-trailer.mp4: recorded in-game (Movie Maker), needs ffmpeg
+tools/site/make_site.sh         # build/site/: index.html + poster.jpg + trailer.mp4 for the current release
+```
+The page's download links point at the Gitea release named in
+`build/version.json`, so rebuild it after each `tools/export.sh` release.
+Gitea doesn't serve HTML pages: copy `build/site/` to any static web host.
+
 ## Layout
 ```
 project.godot          Godot project definition

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.