move input system to core

[Yoyozilla]

Post Beta 1, it was decided that systems belong in the core and not SDK layer. This change will move input

Requirements

• Code files moved in the tree
• Namespaces appropriately updated
• Client code appropriately updated to reflect new namespaces
• Profile(s) updated to reflect the new namespaces

Acceptance criteria

• Demo scenes continue to work

[david-c-kline]

fixed with #3342