[client/ui] Replace fyne UI with Wails (rename ui-wails to ui)

Removes the legacy fyne-based client/ui implementation and renames the
Wails replacement (client/ui-wails) to take its place at client/ui. Go
imports, frontend bindings, CI workflows, goreleaser configs and the
windows .syso icon path are updated to follow the rename.

client/ui/build/linux/appimage/build.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+# Copyright (c) 2018-Present Lea Anthony
+# SPDX-License-Identifier: MIT
+
+# Fail script on any error
+set -euxo pipefail
+
+# Define variables
+APP_DIR="${APP_NAME}.AppDir"
+
+# Create AppDir structure
+mkdir -p "${APP_DIR}/usr/bin"
+cp -r "${APP_BINARY}" "${APP_DIR}/usr/bin/"
+cp "${ICON_PATH}" "${APP_DIR}/"
+cp "${DESKTOP_FILE}" "${APP_DIR}/"
+
+if [[ $(uname -m) == *x86_64* ]]; then
+    # Download linuxdeploy and make it executable
+    wget -q -4 -N https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage
+    chmod +x linuxdeploy-x86_64.AppImage
+
+    # Run linuxdeploy to bundle the application
+    ./linuxdeploy-x86_64.AppImage --appdir "${APP_DIR}" --output appimage
+else
+    # Download linuxdeploy and make it executable (arm64)
+    wget -q -4 -N https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-aarch64.AppImage
+    chmod +x linuxdeploy-aarch64.AppImage
+
+    # Run linuxdeploy to bundle the application (arm64)
+    ./linuxdeploy-aarch64.AppImage --appdir "${APP_DIR}" --output appimage
+fi
+
+# Rename the generated AppImage
+mv "${APP_NAME}*.AppImage" "${APP_NAME}.AppImage"
+