restructure: rsnix kernel + shell crate + rsdos entry point

Architecture:
  rs-dos/  (workspace root, was raisernics/)
  ├── rsnix/     — kernel lib crate (uefi, serial, gop, ps2, interrupts, memory)
  ├── shell/     — shell lib crate (prompt, commands, line input)
  ├── rsdos/     — binary crate (efi_main, init, panic handler)
  └── rsboot/    — future git submodule

No functional changes — boots to shell prompt identically.
Version auto-pulled from Cargo.toml via env!("CARGO_PKG_VERSION").

1 files changed, 2 insertions, 3 deletions

diff --git a/src/ps2.rs b/rsnix/src/ps2.rs
index 4ea8b7a..b83a4e0 100644
--- a/src/ps2.rs
+++ b/rsnix/src/ps2.rs
@@ -346,11 +346,10 @@ fn update_modifiers(scancode: u8, pressed: bool, e0: bool) {
         (0x1D, true) => set_mod(state, MOD_RCTRL, pressed),
         (0x38, false) => set_mod(state, MOD_LALT, pressed),
         (0x38, true) => set_mod(state, MOD_RALT, pressed),
-        (0x3A, false) => {
-            if pressed {
+        (0x3A, false)
+            if pressed => {
                 state.modifiers ^= MOD_CAPS;
             }
-        }
         _ => {}
     }
 }