v0.2.0 of flutpak

CLI tool that generates Flatpak manifests and offline source bundles for Flutter applications. One command prepares everything needed for a Flathub-compatible offline build: generated-sources.json, ma [...] Changelog excerpt: ### Added - lintcommand — flatpak-builder-lintwrapper (requires org.flatpak.Builder) - exportcommand — collects manifest, generated-sources.json, metainfo, and patches into a ready-to-submit directory - validatecommand — appstream-util validatewrapper for AppStream metainfo - Metainfo XML generation from manifest.metainfo:config (name, summary, description, categories, keywords, URLs, screenshots, OARS content rating) - .desktopfile generation from manifest.desktop:config - [...]