Update wiki to the 2.1 model and add prebuilt packages Rewrite Home, Configuration, Architecture, Development and Troubleshooting around window classes, profiles and named detachable sessions, the configurable Ctrl-Q prefix, the custom keyboard driver, editable window titles and the color palette; drop the old templates/terminal-definitions model (kept only as legacy). Update the source-file table and test list to the current units and Makefile. Add a Prebuilt packages section to Installation with the v2.1 release assets (Arch, deb, rpm, tarball). Use GNU/Linux throughout.
Add detailed English project wiki