feature(xen): dynamic platform architecture (#194)

* wip hvm

* feat: move platform stuff all into it's own thing

* hvm work

* more hvm work

* more hvm work

* feat: rework to support multiple platforms

* hvm nonredist

* more hvm work

* more hvm work

* pvh work

* work on loading cmdline

* implement initrd loading for pvh

* partially working pvh support

* fix merge issues

* pvh works!

* swap over to pv support

* remove old kernel stuff

* fix support for pv

* pvh is gone for now

* fix(runtime): debug should be respected

* fix(xen): arm64 is currently unsupported, treat it as such at runtime

* fix(examples): use architecture cfg for boot example

* fix(x86): use IOMMU only when needed for passthrough

* chore(build): print kernel architecture during fetch

crates/xen/xencall/examples/vcpu_context.rs

@@ -1,12 +0,0 @@
-use xencall::error::Result;
-use xencall::XenCall;
-
-#[tokio::main]
-async fn main() -> Result<()> {
-    env_logger::init();
-
-    let call = XenCall::open(0)?;
-    let context = call.get_vcpu_context(224, 0).await?;
-    println!("{:?}", context);
-    Ok(())
-}