Implement cpu usage monitor

Cargo.lock

@@ -8,6 +8,17 @@ version = "1.0.56"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4361135be9122e0870de935d7c439aef945b9f9ddd4199a553b5270b49c82a27"
 
+[[package]]
+name = "async-trait"
+version = "0.1.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed6aa3524a2dfcf9fe180c51eae2b58738348d819517ceadf95789c51fff7600"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -93,6 +104,7 @@ name = "composers"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "async-trait",
  "clap",
  "crossterm 0.23.2",
  "serde",
@@ -219,6 +231,12 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
 [[package]]
 name = "mio"
 version = "0.7.14"
@@ -511,9 +529,11 @@ checksum = "2af73ac49756f3f7c01172e34a23e5d0216f6c32333757c2c61feb2bbff5a5ee"
 dependencies = [
  "bytes",
  "libc",
+ "memchr",
  "mio 0.8.2",
  "num_cpus",
  "once_cell",
+ "parking_lot 0.12.0",
  "pin-project-lite",
  "signal-hook-registry",
  "tokio-macros",