feat(userspace): terminal server + shell desktop; US keymap w/ shift; libkos allocator multi-page fix; panics print

Cargo.toml

@@ -2,6 +2,7 @@
 members = [
     "crates/adapter-riscv",
     "crates/apps/hello",
+    "crates/apps/shell",
     "crates/apps/echo",
     "crates/apps/smptest",
     "crates/apps/spawntest",
@@ -35,6 +36,7 @@ members = [
     "crates/servers/power-server",
     "crates/servers/print-server",
     "crates/servers/session-server",
+    "crates/servers/terminal-server",
     "crates/servers/storage-server",
     "crates/servers/sync-server",
     "crates/servers/telephony-server",