Use tokio in asusctl

Cargo.lock

@@ -588,8 +588,8 @@ dependencies = [
  "serde",
  "serde_derive",
  "serde_json",
- "smol",
  "sysfs-class",
+ "tokio",
  "toml",
  "zbus",
  "zvariant",
@@ -1705,6 +1705,16 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "num_cpus"
+version = "1.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19e64526ebdee182341572e50e9ad03965aa510cd94427a4549448f285e957a1"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
 [[package]]
 name = "num_enum"
 version = "0.5.7"
@@ -2537,11 +2547,25 @@ dependencies = [
  "autocfg",
  "libc",
  "mio",
+ "num_cpus",
+ "once_cell",
  "pin-project-lite",
  "socket2",
+ "tokio-macros",
  "winapi",
 ]
 
+[[package]]
+name = "tokio-macros"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9724f9a975fb987ef7a3cd9be0350edcbe130698af5b8f7a631e23d42d052484"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "toml"
 version = "0.5.9"