refactor, implement LCG

LCG ... Linear Congruential Generator

src/commonMain/kotlin/com/infendro/random/PRNG.kt

@@ -1,36 +0,0 @@
-package com.infendro.random
-
-import com.infendro.bytearray.toInt
-import com.infendro.hash.HashFunction
-import kotlin.random.Random
-
-abstract class PRNG : Random() {
-    abstract fun seed(
-        seed: ByteArray,
-    )
-
-    abstract fun reseed(
-        entropy: ByteArray,
-    )
-
-    abstract fun generate(
-        count: Int,
-    ): ByteArray
-
-    override fun nextBits(
-        bitCount: Int,
-    ): Int {
-        if (bitCount !in 0..32) throw Exception()
-        if (bitCount == 0) return 0
-
-        return generate(4).toInt() ushr (32 - bitCount)
-    }
-
-    companion object {
-        fun HMAC(
-            function: HashFunction,
-        ): HMAC {
-            return com.infendro.random.HMAC(function)
-        }
-    }
-}