Initial implementation of the random decimal subcommand. (#2762)

Co-authored-by: Stacy Maydew <stacy.maydew@starlab.io>

crates/nu-cli/tests/commands/random/decimal.rs

@@ -0,0 +1,37 @@
+use nu_test_support::{nu, pipeline};
+
+#[test]
+fn generates_an_decimal() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        random decimal 42..43
+        "#
+    ));
+
+    assert!(actual.out.contains("42") || actual.out.contains("43"));
+}
+
+#[test]
+fn generates_55() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        random decimal 55..55
+        "#
+    ));
+
+    assert!(actual.out.contains("55"));
+}
+
+#[test]
+fn generates_0() {
+    let actual = nu!(
+        cwd: ".", pipeline(
+        r#"
+        random decimal ..<1
+        "#
+    ));
+
+    assert!(actual.out.contains('0'));
+}

crates/nu-cli/tests/commands/random/mod.rs

@@ -1,4 +1,5 @@
 mod bool;
+mod decimal;
 mod dice;
 mod integer;
 #[cfg(feature = "uuid_crate")]