Complete Dataframe MVP (#3373)

* Dataframe MVP

* Removed test csv file

* Dataframe MVP

* Removed test csv file

* New revision polars

* New revision polars

* csv file reader

* argument parser for file reader

* Parser from Row primitive

* Column conversion

* Added as f32 and f64

* Parsing row to dataframe

* Removed repeated push to vector

* Accept table values to create dataframe

* Removed default serde

* Dataframe to rows to show data

* Save name of file with dataframe

* Usage example

* Upgrade polars version

* Clippy changes

* Added print function with head and tail

* Move dataframe struct to folder

* Lock file after running tests and merge

* Optional feature for dataframe

* Removed dataframe from plugins

* Update primitive.rs

Co-authored-by: JT <jonathandturner@users.noreply.github.com>

crates/nu-value-ext/Cargo.toml

@@ -17,3 +17,6 @@ nu-source = { path = "../nu-source", version = "0.31.0" }
 indexmap = { version = "1.6.1", features = ["serde-1"] }
 itertools = "0.10.0"
 num-traits = "0.2.14"
+
+[features]
+dataframe = ["nu-protocol/dataframe"]

crates/nu-value-ext/src/lib.rs

@@ -724,6 +724,10 @@ pub fn get_data<'value>(value: &'value Value, desc: &str) -> MaybeOwned<'value,
         UntaggedValue::Block(_) | UntaggedValue::Table(_) | UntaggedValue::Error(_) => {
             MaybeOwned::Owned(UntaggedValue::nothing().into_untagged_value())
         }
+        #[cfg(feature = "dataframe")]
+        UntaggedValue::Dataframe(_) => {
+            MaybeOwned::Owned(UntaggedValue::nothing().into_untagged_value())
+        }
     }
 }