[Waypoint] Allow choosing move path of units

This is a re-post of my old post into the Ideas section. with the new stealth system, it is now needed more.

The idea was: What if we can drag the move action to define the path our units will take?

It will specifically help in combat for some situations like:
1. Avoiding ambush and ZOC from units that can be hiding in trees or up cliffs (?) if there is a different path to take.
2. Avoiding ambush from stealth units if we can guess their position.
3. Uncovering enemy hidden units along a specific path if we are hunting for them with cavalry for multiple unveilings per turn.
4. Moving our stealth units in specific paths to avoid giving their position away (If that wasn't already implemented in the stealth update).
5. Maybe even for moving non-stealth units while keeping them hidden in the enemy's fog of war to keep them safe or for a flanking surprise attack around enemy lines. whether we move them hiding in trees or just out of sight range.

It will also be very much appreciated if implemented to be used on campaign map for easier management of armies and also to avoid ambushes with that appeared with the stealth update.

UPDATE: It will also be cool to have a movement queue UI with the original idea of selected path.. so for example, if you want your army to move to multiple tiles in order, you can shift + click while designating the path of the army whether that move is generated by the engine in one normal click for the fastest path or manually chosen by the drag feature suggested in the original idea.