Enhance move-to-let to add or augment :let binding when in macros that support it

[justone]

Is your feature request related to a problem? Please describe.

When using for, there are times where I want to move an expression to the :let

For instance, starting with this:

(for [x [1 2 3 4]]
  (* 2 x))

I would like to end up with this:

(for [x [1 2 3 4]
      :let [a (* 2 x)]]
  a)

However, running move-to-let results in this:

(for [x [1 2 3 4]]
  (let [a (* 2 x)]
    a))

Describe the solution you'd like

When a move-to-let action is performed inside a for macro, it should create (or add to) the :let section of the macro binding instead of introducing a standalone let block.

Describe alternatives you've considered

I usually run the move-to-let and then use editor commands to copy/paste the resulting block into the :let.

Additional context

This would also apply to doseq, as it also supports a :let binding.

[justone]

This might also apply to introduce-let.

[danielhvs]

I suggest making it separate.
Keep introduce let
Add introduce :let
It's more flexible IMHO