Implement RLE and Bit Packing Encoder

Implement an encoding algorithm that combines Run Length Encoding (RLE) and Bit Packing (BP). RLE encodes consecutive identical elements as RLE[element, frequency] and is applicable when there are 8 or more repetitions. BP packs exactly 8 non-RLE-eligible elements. RLE is always preferred: if the remaining elements at the end of a sequence are all identical (even if fewer than 8), they are encoded using RLE rather than BP. Examples: - [5,5,5] → RLE[5,3] - [1,1,1,2,3,4,5] → BP[1,1,1,2,3,4,5] - [0,0,0,0,0,0,0,0,0,2,3,4] → RLE[0,9], BP[2,3,4] - [1,1,1,1,1,1,1,1,1,2,2,1] → RLE[1,9], BP[2,2,1] - [0,0,0,0,0,0,0,0,0,2,2,2] → RLE[0,9], RLE[2,3]