Edith 0.9.0

• Add the 0.9.0 metainfo release entry
• Write the release notes for the next version
• Reword the README status notice
• Take the Pages checkout from the environment, not a hardcoded path
• Flag tabs and recents whose file was deleted on the server
• Add a Minify action for JS and CSS files (terser, csso via JavaScriptCore)
• Drop the connected-page icon, title the recent files list
• Keep the 0.8.1 release archives out of the Flatpak build