Rename dataframe describe to summary so that the normal describe isn't overloaded (#7176)

This closes #6770.

crates/nu-command/src/dataframe/eager/mod.rs

@@ -1,6 +1,5 @@
 mod append;
 mod columns;
-mod describe;
 mod drop;
 mod drop_duplicates;
 mod drop_nulls;
@@ -20,6 +19,7 @@ mod shape;
 mod slice;
 mod sql_context;
 mod sql_expr;
+mod summary;
 mod take;
 mod to_arrow;
 mod to_csv;
@@ -32,7 +32,6 @@ use nu_protocol::engine::StateWorkingSet;
 
 pub use append::AppendDF;
 pub use columns::ColumnsDF;
-pub use describe::DescribeDF;
 pub use drop::DropDF;
 pub use drop_duplicates::DropDuplicates;
 pub use drop_nulls::DropNulls;
@@ -52,6 +51,7 @@ pub use shape::ShapeDF;
 pub use slice::SliceDF;
 pub use sql_context::SQLContext;
 pub use sql_expr::parse_sql_expr;
+pub use summary::Summary;
 pub use take::TakeDF;
 pub use to_arrow::ToArrow;
 pub use to_csv::ToCSV;
@@ -75,7 +75,7 @@ pub fn add_eager_decls(working_set: &mut StateWorkingSet) {
         AppendDF,
         ColumnsDF,
         DataTypes,
-        DescribeDF,
+        Summary,
         DropDF,
         DropDuplicates,
         DropNulls,

crates/nu-command/src/dataframe/eager/summary.rs

@@ -15,15 +15,15 @@ use polars::{
 };
 
 #[derive(Clone)]
-pub struct DescribeDF;
+pub struct Summary;
 
-impl Command for DescribeDF {
+impl Command for Summary {
     fn name(&self) -> &str {
-        "describe"
+        "summary"
     }
 
     fn usage(&self) -> &str {
-        "Describes dataframes numeric columns"
+        "For a dataframe, produces descriptive statistics (summary statistics) for its numeric columns."
     }
 
     fn signature(&self) -> Signature {
@@ -34,15 +34,15 @@ impl Command for DescribeDF {
             .named(
                 "quantiles",
                 SyntaxShape::Table,
-                "optional quantiles for describe",
+                "provide optional quantiles",
                 Some('q'),
             )
     }
 
     fn examples(&self) -> Vec<Example> {
         vec![Example {
-            description: "dataframe description",
-            example: "[[a b]; [1 1] [1 1]] | into df | describe",
+            description: "list dataframe descriptives",
+            example: "[[a b]; [1 1] [1 1]] | into df | summary",
             result: Some(
                 NuDataFrame::try_from_columns(vec![
                     Column::new(
@@ -266,6 +266,6 @@ mod test {
 
     #[test]
     fn test_examples() {
-        test_dataframe(vec![Box::new(DescribeDF {})])
+        test_dataframe(vec![Box::new(Summary {})])
     }
 }