move api schema into proxmox::api crate

And leave some compat imports in api_schema.rs to get it to
build with minimal changes.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

src/api2/node.rs

@@ -1,4 +1,5 @@
-use crate::api_schema::router::*;
+use proxmox::api::router::{Router, SubdirMap};
+use proxmox::api::list_subdirs_api_method;
 
 mod tasks;
 mod time;