fmt_enum prints the common ValueEnum operands by name (Capability Shader,
Addressing/Memory model Logical GLSL450, ExecutionModel GLCompute, StorageClass,
Decoration, ...); BitEnums stay numeric (their bit_set %v form is too verbose to
read inline). The header comment now reads version/generator/bound from the
encoded words, so Bound reflects the computed value, not the pre-encode 0.
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.
