1.0.0.2 - ngadminui tree menu, language config, cjw-exponential-media installer

Fixes

• Tree menu: Map\URI now includes ngadminui: ngadminui — URI-based access (/ngadminui) works correctly
• Tree menu JS: BackendJavaScriptList[]=contentstructuremenu/contentstructuremenu.js added to ngadminui design.ini
• Language config: ger-DE added to admin_group languages; eng-GB added to ngadminui SiteLanguageList; RegionalSettings added to legacy.yml
• Installer: cjw-exponential-media added to composer.json; ezplatform-install script updated
• INSTALL.md: Step 6 rewritten to use php bin/console ezplatform:install cjw-exponential-media
• package.json: Removed NODE_OPTIONS=--openssl-legacy-provider (incompatible with Node >= 16.17)