Planter: Create Planter System to Work With Seed

[derwt]

Port the planter code from Flori 3D over to our VR version. Don't copy and paste, but make the system work similarly.

• Instead of the seed programmatically snapping to spot below dirt surface, use a Snap Drop Zone
• Planter should house seed and keep track of Water being deposited in it

[khcanniff]

I believe I have completed this.

[derwt]

Good job Keely! This script will need to be revisited to call methods we'll write in Flori_Seed.cs, but the structure's there now!