chore: add vanilla edk2 download for linux

justfile

@@ -17,9 +17,10 @@ CPU := if ARCH_NAME == "aarch64" { "host" } else { "max" }
 OVMF_ARM := if OS_NAME == "macos" {
     HB_PREFIX + "/share/qemu/edk2-aarch64-code.fd"
 } else {
-    env_var_or_default("OVMF_PATH", "/usr/share/edk2/aarch64/QEMU_EFI.fd")
+    BUILD_DIR + "/edk2/edk2-aarch64-code.fd"
 }
 
+
 DISPLAY_FLAGS := if OS_NAME == "macos" {
     "-display cocoa,show-cursor=on"
 } else {
@@ -43,6 +44,14 @@ _prep:
     @mkdir -p {{BUILD_DIR}}/Bootloader
     @mkdir -p {{TEMP_DIR}}/Bootloader
     @mkdir -p {{BUILD_DIR}}/Kernel
+    @if [ "{{OS_NAME}}" != "macos" ]; then \
+        mkdir -p {{BUILD_DIR}}/edk2; \
+        if [ ! -f "{{OVMF_ARM}}" ]; then \
+            echo "⬇️  Downloading vanilla EDK2 for Linux..."; \
+            curl -sL -o "{{OVMF_ARM}}.bz2" "https://github.com/qemu/qemu/raw/master/pc-bios/edk2-aarch64-code.fd.bz2"; \
+            bzip2 -d "{{OVMF_ARM}}.bz2"; \
+        fi \
+    fi
 
 @build: _prep
     @echo "🛠️ Building everything..."