Fix: hardcoded JIT code buffer size (#98)

* code buffer size is calculated based on RandomX parameters
* added a maximum value constraint for program size and superscalar latency
* reduced the x86 code size of memory instructions by 1 byte
* disclaimer note in configuration documentation

src/jit_compiler_x86.hpp

@@ -43,8 +43,6 @@ namespace randomx {
 
 	typedef void(JitCompilerX86::*InstructionGeneratorX86)(Instruction&, int);
 
-	constexpr uint32_t CodeSize = 64 * 1024;
-
 	class JitCompilerX86 {
 	public:
 		JitCompilerX86();