OS-DEV v1519 -- cyberpunk desktop + try-it-now bundle

A from-scratch x86_64 OS: kernel, TCP/IP + TLS 1.3, a JS engine, a sandboxed
ring-3 web browser, and a from-scratch desktop with a new cyberpunk visual
theme (synthwave grid wallpaper, neon glow chrome).

Try it now

Download os-dev-tryit.zip below, unzip, and see the bundled RUN_ME.md
for a one-line qemu-system-x86_64 command (needs QEMU installed, nothing
else) -- boots straight to the graphical desktop.

What's in this snapshot

See WHATS-NEXT.md
for the full chronological changelog (1519 milestones) and
README.md for the
project overview, architecture, and honest caveats.