Enhanced support for 2004-2006 protocol versions

Ideally we can support everything 196-204 because the underlying structure of packets is nearly identical (just the opcodes are different and >201 has the banking trap).

Refactor Payload203Parser so that it stores every opcode in a lookup table, allowing the table to be replaced when Payload203Parser is initialized by its constructor.

Target protocols:

• 202 - LeadingBot, BobbyBot PK¹ ()
• 201 - TheLoveMachine, SBot, IxBot/RB/AutoRune²
• 200 - near-identical to 201
• 199 - TBoT, IxBot/RB/AutoRune²
• 198 - TheLoveMachine, IxBot/RB/AutoRune²
• 197 - near-identical to 198
• 196 - RandomRune, Reibot², RB/AutoRune²

1. not gonna encourage their use since they're PvP bots, but other open source options are lacking ↩

2. closed source, might be able to fake an auth server, don't put your hopes up ↩ ↩² ↩³ ↩⁴ ↩⁵