Create RTS mechanics

[Diah50]

Create functions and mechanics for

• Movement - units should respond to where you click, which is where they move to.
• Combat - health, damage, armor, attack speed, and range working as intended.
• Building - units with build skill should be able to build structures, cancel construction, and help speed up the construction by using multiple worker units.
• Conversion - units should be able to convert resource generators passively by being near them and converting them slowly or quickly. if a enemy unit and your unit are near the resource generator, they will stop passively converting the resource generator.
• Unit Selection - being able to have a unlimited unit selection cap and being able to create a box to select a group of units.
• Resource Generation - generators should be able to give the player resources passively over time when converted to their side.