The item name for wasm type entries should have the stringified type

[fitzgen]

💡 Feature Description

We should render the human readable type along with which entry in the types section it is.

The change needs to happen in the parse_items trait method impl for TypeSection: https://github.com/rustwasm/twiggy/blob/master/parser/wasm_parse/mod.rs#L248-L249

💻 Example Usage

Right now we get output like:

              7 ┊      0.00% ┊ type[4]
              7 ┊      0.00% ┊ type[11]
              6 ┊      0.00% ┊ type[3]

but instead we should have output like:

              7 ┊      0.00% ┊ type[4]: (i32,  i32) -> i32
              7 ┊      0.00% ┊ type[11]: (i32) -> nil
              6 ┊      0.00% ┊ type[3]: (f64) -> f64