Add RetroDECK support - #213
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Add a new ESDE CFW target covering EmulationStation Desktop Edition setups on desktop Linux (Steam Deck, SteamOS, Bazzite): standalone ES-DE, EmuDeck, and RetroDECK — one binary, with the flavor selected via a first-run variant wizard and switchable in a new ES-DE Settings screen. Directories resolve through a precedence chain: explicit config override > environment variable > variant discovery > variant default. Discovery reads EmuDeck's settings.sh (emulationPath), RetroDECK's retrodeck.json (as requested by the RetroDECK maintainer in rommapp#236), and ES-DE's es_settings.xml, so relocated/SD-card installs work without manual configuration. Every directory (base, ROMs, BIOS, saves, ES-DE data, media) can also be overridden individually in settings. ES-DE layout differences from Batocera-style ES are handled: - gamelists are written to <appdata>/gamelists/<system>/gamelist.xml with ./-relative game paths (new gamelist.Options hook) - media is written to <media>/<system>/{covers,marquees,backcovers, fanart,screenshots,videos,manuals} matched by ROM basename; a new UsesArtSuffixes() predicate disables the -thumb/-marquee/-boxback/ -fanart filename suffixes for ES-DE - no ES restart scheduling (grout runs as ES-DE's child); the bezel art option is hidden (no such media type in ES-DE) Grout installs as an ES-DE port in <roms>/ports/. The launcher exports GROUT_ESDE_ROMS_DIR from its own location so the ROMs dir is correct for any variant, and carries the Steam Deck input workarounds from PR rommapp#235 (ignore axis-motion event flooding, suppress Steam keyboard). The amd64 build now bundles the full SDL library stack for SteamOS's sealed OS and RetroDECK's flatpak sandbox. Includes platform table (docs/platforms/ESDE.md) generated into cfw/esde/data/platforms.json, packaging target (Grout-ESDE.zip), CI release wiring, in-app updater support, install/settings docs, and unit tests for path precedence and the three config parsers. Closes rommapp#210, closes rommapp#238. Builds on rommapp#235, rommapp#236, and rommapp#213.
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Adds initial support for RetroDECK, so it can be added as a non-Steam game.
Feel free to request any change, especially if I forgot something.
This is a follow-up of this issue: #210.
EDIT: Added associated documentation.
EDIT2: Got inspired and added an automatic install script with media, so it looks nice in the Steam game library.
It currently looks fine on Bazzite, but I have an issue with
nonsteamnot detecting the Steam install on SteamOS. I'll investigate when I have a bit more free time.