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, 16 insertions, 1 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 611d52a..1d697fc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,5 +3,20 @@
 version = 4
 
 [[package]]
-name = "raisernics"
+name = "rsdos"
 version = "0.2.0"
+dependencies = [
+ "rsnix",
+ "shell",
+]
+
+[[package]]
+name = "rsnix"
+version = "0.2.0"
+
+[[package]]
+name = "shell"
+version = "0.2.0"
+dependencies = [
+ "rsnix",
+]