Lots of improvements.

* Better script names and grammar fix.
* Bump Rust
* Enforce more lints.
* Improve few struct definitions by removing box.
* Many minor implementation improvements.

Cargo.lock

@@ -33,9 +33,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "clap"
-version = "4.0.17"
+version = "4.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06badb543e734a2d6568e19a40af66ed5364360b9226184926f89d229b4b4267"
+checksum = "91b9970d7505127a162fdaa9b96428d28a479ba78c9ec7550a63a5d9863db682"
 dependencies = [
  "atty",
  "bitflags",
@@ -48,9 +48,9 @@ dependencies = [
 
 [[package]]
 name = "clap_derive"
-version = "4.0.13"
+version = "4.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c42f169caba89a7d512b5418b09864543eeb4d497416c917d7137863bd2076ad"
+checksum = "0177313f9f02afc995627906bbd8967e2be069f5261954222dac78290c2b9014"
 dependencies = [
  "heck",
  "proc-macro-error",
@@ -178,9 +178,9 @@ checksum = "e82dad04139b71a90c080c8463fe0dc7902db5192d939bd0950f074d014339e1"
 
 [[package]]
 name = "ordered-float"
-version = "3.3.0"
+version = "3.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f74e330193f90ec45e2b257fa3ef6df087784157ac1ad2c1e71c62837b03aa7"
+checksum = "d84eb1409416d254e4a9c8fa56cc24701755025b458f0fcd8e59e1f5f40c23bf"
 dependencies = [
  "num-traits",
 ]