Add --attribute-comment field to js_client.py and tsd_client.py, like the one added to python_client.py in #262. This is a prerequisite for dropbox/dropbox-sdk-js#891 which adds scopes to the outputted clients for easier reference.

Also adds appropriate testing and updates the docstring for the python_client.py, making it more succinct and aligned with the other two.

It is not legal typescript to wrap a `declare module "foo/bar" {` statement - this is a SyntaxError.  as such, we need to `self.emit()` this statement instead of `self.emit_wrapped_text()`.

* Version compatible inspect handling for class parameters

`getargspec` was deprecated in Python 3.0, but finally removed in Python
3.11. For reference: Pylons/pyramid#3688

That seems like a valid amount of time.

We can do our best effort and if the user is running a Python version
that still has `getargspec` use that, but if they have `getfullargspec`
which is available in Python 3.11, we can use that.

* Update ir_generator.py

include `isclass`

Co-authored-by: Jay Palacio <[email protected]>

Co-authored-by: vidit bhargava <[email protected]>

Co-authored-by: vidit bhargava <[email protected]>