ui: add asset image on create channel view; allow to choose image on create profile (#6891)

* ui: create channel picture

* more centered

* better symmetry

* less diff

* choose image on create profile

* fix padding

* fix padding, fit into screen

* fix button layout

* placeholders

* fix padding

* channel pictures

* adjust asset_dir in scripts

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Co-authored-by: Evgeny Poberezkin <evgeny@poberezkin.com>
Co-authored-by: shum <github.shum@liber.li>

scripts/desktop/make-appimage-linux.sh

@@ -18,7 +18,7 @@ libcrypto_path=$(ldd common/src/commonMain/cpp/desktop/libs/*/libHSdirect-sqlcip
 trap "rm common/src/commonMain/cpp/desktop/libs/*/`basename $libcrypto_path` 2> /dev/null || true" EXIT
 cp $libcrypto_path common/src/commonMain/cpp/desktop/libs/*
 
-./gradlew -Psimplex.assets.dir=../../assets createDistributable
+./gradlew -Psimplex.assets.dir="$ASSETS_DIR" createDistributable
 rm common/src/commonMain/cpp/desktop/libs/*/`basename $libcrypto_path`
 
 rm -rf $release_app_dir/AppDir 2>/dev/null