19 feature fire randomness activity

[totally-not-frito-lays]

Why: Created a fire activity using smoothing randomness algorithm called perlin noise.

Closes the following issues (all PRs must close an issue):

• closes #19

What's being changed

Created a new library file which implements perlin 1D and 2D perlin noise under the RNG class.

Also added a new example describing how to use the new noise function in a fire activity.

Testing Instructions

Describe the ways to test it and any relevant information.

• Confirm via the serial monitor that
  • the values transition with small jumps (no larger than 10)
  • the values range from 0 - 155.
• Confirm visually that the pattern smoothly transitions between red, orange, and yellow but no other colors

1. Using numbers to demonstrate the order of actions to take is great

Check off the following

• [x] I have tested my changes locally
• [x] I have incremented the version number in the library.properties file [^1]

[^1]: See CONTRIBUTING.md for more information on version semantics