print(m, sb, options): disassemble a Module into a spirv-dis-style listing.
Encodes to a scratch buffer (doubling on overflow) and walks the word stream
generically through the operand-layout table, so every opcode disassembles with
no per-op code -- Id operands as %id, LiteralString quoted, the result-id column
right-aligned before OpName:
; SPIR-V
; Version: 1.5
; Bound: 9
%2 = OpTypeInt 32 1
%4 = OpConstant %2 10
%6 = OpIAdd %2 %4 %5
OpReturn
Enums print numerically for now (symbolic names a refinement). Completes the
encode / decode / print verb triad.
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