feat(arnitech): a Blade autoboots the first program on device 8

With ARNITECH_BLADE, BASIC's cold start calls blade_autoboot before READY.: it
loads "*" from device 8 to BASIC's start, as LOAD"*",8 does, and BASIC then
ends that LOAD as a program's, which RUNs what it loaded. RUN/STOP held on the
Terminal Card, no Floppy, or no file goes on to READY.

src/basic/,imports.s

@@ -33,6 +33,8 @@
 
 ;; #ALIAS# SELDEV              = KERNAL_0.SELDEV
 
+;; #ALIAS# blade_autoboot      = KERNAL_0.blade_autoboot
+
 ;
 ; MEGA65 specific parts
 ;