Use metadata to track VmFrames

In this commit, the frame metadata storage schema is implemented. The bootstrap process is refactored
and a boot page table is introduced to perform early stage metadata mapping. The metadata is then used
to track `VmFrame`s instead of the former `Arc` approach.

framework/aster-frame/src/vm/heap_allocator.rs

@@ -14,7 +14,7 @@ use crate::{
     prelude::*,
     sync::SpinLock,
     trap::disable_local,
-    vm::{frame_allocator::FRAME_ALLOCATOR, PAGE_SIZE},
+    vm::{frame::allocator::FRAME_ALLOCATOR, PAGE_SIZE},
     Error,
 };