fix stor reset when there are foreign keys (#14772)

# Description

This PR fixes a problem with `stor reset`. That problem was that it
called drop_all_tables which just iterated through the tables and
dropped them one by one. This works as long as there are no foreign keys
or if the tables are dropped in the "right" order. It doesn't work in
most cases since you have to know what order to drop tables in. So, this
PR turns off foreign key constraints, then drops all the tables, then
turns the foreign key constraints back on, which seems to work well...
so far. :)

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crates/nu-command/src/stor/reset.rs

@@ -49,9 +49,25 @@ impl Command for StorReset {
         ));
 
         if let Ok(conn) = db.open_connection() {
+            conn.execute("PRAGMA foreign_keys = OFF", [])
+                .map_err(|err| ShellError::GenericError {
+                    error: "Failed to turn off foreign_key protections for reset".into(),
+                    msg: err.to_string(),
+                    span: Some(Span::test_data()),
+                    help: None,
+                    inner: vec![],
+                })?;
             db.drop_all_tables(&conn)
                 .map_err(|err| ShellError::GenericError {
-                    error: "Failed to open SQLite connection in memory from reset".into(),
+                    error: "Failed to drop all tables in memory from reset".into(),
+                    msg: err.to_string(),
+                    span: Some(Span::test_data()),
+                    help: None,
+                    inner: vec![],
+                })?;
+            conn.execute("PRAGMA foreign_keys = ON", [])
+                .map_err(|err| ShellError::GenericError {
+                    error: "Failed to turn on foreign_key protections for reset".into(),
                     msg: err.to_string(),
                     span: Some(Span::test_data()),
                     help: None,