Rebrand to iiEasy: naming, logo, l10n, docs, assets

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/install_linux_deps.sh

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+#!/bin/bash
+# Зависимости для сборки Flutter-приложения под Linux (ручная установка Flutter, не snap)
+set -e
+echo "Установка зависимостей для Flutter Linux desktop..."
+sudo apt-get update -y
+sudo apt-get install -y \
+  clang \
+  cmake \
+  ninja-build \
+  pkg-config \
+  libgtk-3-dev \
+  liblzma-dev \
+  libstdc++-12-dev \
+  libsecret-1-dev
+echo "Готово. Запустите: export PATH=\"\$HOME/development/flutter/bin:\$PATH\" && flutter doctor -v"
+echo "Затем в каталоге проекта: flutter run -d linux"