Rename: change the SyntaxShape of -c flag from list to record (#10526)

# Description
Fixes: #7085 
Also closes: #7526 

# User-Facing Changes
After this change, we need to use `-c` flag like this:
```nushell
[[a, b, c]; [1, 2, 3]] | rename -c { a: ham }
```
But we can rename many columns easily, here is another example:
```nushell
[[a, b, c]; [1, 2, 3]] | rename -c { a: ham, b: ham2 }
```

crates/nu-command/tests/commands/rename.rs

@@ -107,10 +107,10 @@ fn errors_if_columns_param_is_empty() {
                 | lines
                 | wrap name
                 | default "arepa!" hit
-                | rename -c []
+                | rename -c {}
                 "#
         ));
 
-        assert!(actual.err.contains("The column list cannot be empty"));
+        assert!(actual.err.contains("The column info cannot be empty"));
     })
 }