* feat: move FTP server to third_party and keep Docker
* docs: add ftpsrv to project credits
* feat: add FTP, Docker, and Remote Play support
* docs: document FTP and Remote Play
* feat: improve dependency scripts and add ShadowMountPlus
* docs: update ShadowMountPlus credits
* docs: add ShadowMountPlus config example
* i18n: normalize locale terminology and validation
* fix: launch ShadowMountPlus from memory