feat(random)!: add random functions rand and getSeed. seedRand no longer returns function and accepts a number

[straker]

Random implementation based off Python random module

• Moved randInt and seedRand to own file, added rand and getSeed functions
• seedRand no longer returns rand as a function but instead just modifies the seed
• seedRand accepts a number (or no parameter and defaults to current time)
• updated the seedRand string hash function from xfnv1a to MurmurHash3 to reuse Math.iml for slightly better compression
• randInt accepts a function as 3rd parameter which can be used to pass a function that can bias the random number
• randInt uses rand by default instead of Math.random so is affected by seeding the PRNG
• updated the PRNG to use SplitMix32 algorithm instead of LCG (Lehmer RNG) as LCG is not considered a good PRNG

Closes #379
Closes #378
Closes #377
Closes #374

[sylfel]

Nice job !