[Intent FEATURE REQUEST] ForLoop with variables while specifying bounds of range

[Vibhu-Agarwal]

A For Loop intent which could handle filling of slots interactively.
var1 and var2 can be variables as well as literals.
Look if Amazon.NUMBER and our custom variable type slot types can be combined into one slot type. If yes, use that new slot type for var1 and var2. If not, extend Amazon.NUMBER and manually add slot values of custom variable type - can do this in JSON Editor.

Utterances Format:

• Scenario1: create a for loop from {var1} to {var2}
• Scenario2: create a for loop from {var1}
• Scenario3: create a for loop

Slots

• var1 - new special variable type (as mentioned above)
• var2 - new special variable type (as mentioned above)