Class ByteBuffer

Clear all data and reset all positions

Drop all data before current offset and reset positions This is the key method for memory management - removes processed data

Write a variable-length integer (QUIC-style varint) Encoding:

• 2 MSB = 00: 1 byte (6 bits) for values 0-63
• 2 MSB = 01: 2 bytes (14 bits) for values 0-16383
• 2 MSB = 10: 4 bytes (30 bits) for values 0-1073741823
• 2 MSB = 11: 8 bytes (62 bits) for values 0-4611686018427387903