refactor: unsafe only in adapter + libkos; forbid(unsafe_code) everywhere else; libkos Window (volatile, bounds-checked MMIO/DMA/shared mem), entry!, thread::spawn; MapRegion returns pages; kernel const-built (with_cores/install_platform); newtype addrs

crates/drivers/framebuffer/mock/src/lib.rs

@@ -1,4 +1,5 @@
 #![no_std]
+#![forbid(unsafe_code)]
 
 use port_framebuffer::Framebuffer;
 use types::display::{Color, Dimension, ScreenCoord};