feat: add actions to expand comprehensions/inline for loops

[AckslD]

On top of #66. @CKolkey I added these actions to expand (list/set/dict) comprehensions and inline for-loops for Python. I added them in actions.ft.python to make them optionally accessible instead of in filetypes.python to not change the current default behavior. Let me know if you prefer some other structure or way of adding this. If this looks okay do you think this should be mentioned in the README?

This can be used as:

local python_actions = require('ts-node-action.actions.ft.python')
require("ts-node-action").setup({
  python = {
    list_comprehension = python_actions.expand_list_comprehension,
    set_comprehension = python_actions.expand_set_comprehension,
    dictionary_comprehension = python_actions.expand_dictionary_comprehension,
    for_statement = python_actions.inline_for_statement
  },
})

[CKolkey]

Do you mind adding some specs that give a clear expand <-> collapse state check?

[AckslD]

@CKolkey sure thing! Since these are just exposed as optional actions a user can include in their config how do you think that should be handled in the tests?