[RFC]: add `ndarray/spread-dimensions`

[kgryte]

ref: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/%40stdlib/ndarray/base/spread-dimensions

We'll want to always return a read-only array. Given how ndarray/base/spread-dimensions is implemented, we'll likely need to first create a read-only view before calling down into the base implementation, so that a read-only view is returned.

The other option would be to add a writable parameter to ndarray/base/spread-dimensions, but then we'd also need to rework remove-singleton-dimensions, expand-dimensions, and prepend-singleton-dimensions similarly. I'm open to discussion whether we should treat these APIs similar to the base "slice" APIs where we support an explicit writable parameter.

[kgryte]

Once the discussion points above are resolved, we'll also want

• ndarray/expand-dimensions
• ndarray/remove-singleton-dimensions
• ndarray/prepend-singleton-dimensions