Document superterm 3.0: control CLI, always-server sessions, multi-user
Document GNU/Linux and macOS support across the wiki superterm now builds and runs natively on both GNU/Linux and macOS from one source tree; the PTY/process layer (st_pty.pas) is the only platform- conditional unit. Update Home, Installation (add a macOS build section), Development, Architecture and the footer accordingly.
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