chore: remove unmaintained atty crate (#6691)

## Description
closes #6599.

atty [is no longer
maintained](softprops/atty@5bfdbe9),
and equivalent functionality is available in the std-lib as of rust
1.79. This PR switches to that functionality and removes `atty`
dependency.

Cargo.toml

@@ -112,7 +112,6 @@ ansi_term = "0.12"
 anyhow = "1.0"
 assert-json-diff = "2.0"
 async-trait = "0.1"
-atty = "0.2"
 aws-config = "1.5"
 aws-sdk-kms = "1.44"
 byte-unit = "5.1"

forc-plugins/forc-crypto/Cargo.toml

@@ -11,7 +11,6 @@ repository.workspace = true
 [dependencies]
 anyhow.workspace = true
 async-trait.workspace = true
-atty.workspace = true
 clap = { workspace = true, features = ["derive", "env"] }
 forc-tracing.workspace = true
 forc-util.workspace = true

forc-plugins/forc-crypto/src/main.rs

@@ -1,13 +1,12 @@
 //! A `forc` plugin for converting a given string or path to their hash.
 
 use anyhow::Result;
-use atty::Stream;
 use clap::Parser;
 use forc_crypto::{address, keccak256, keys, sha256, Command};
 use forc_tracing::{init_tracing_subscriber, println_error};
 use std::{
     default::Default,
-    io::{stdin, stdout, Read, Write},
+    io::{stdin, stdout, IsTerminal, Read, Write},
 };
 use termion::screen::IntoAlternateScreen;
 
@@ -53,7 +52,7 @@ pub fn display_output<T>(message: T) -> anyhow::Result<()>
 where
     T: serde::Serialize,
 {
-    if atty::is(Stream::Stdout) {
+    if stdout().is_terminal() {
         let text = serde_yaml::to_string(&message).expect("valid string");
         if has_sensible_info(&message) {
             let mut screen = stdout().into_alternate_screen()?;