feat(compiler): self-hosting spec + generator multi-enum support

- Add speckl-compile.speckdl — compiler formally specified in SpeckDL
- Generator: multi-enum detection, value→enum mapping, trailing comma cleanup
- Emit blocks collapsed to single-line (parser limitation)
- Generated artifacts: provenance, BOMs, WAT, TypeScript (2 known bugs → engineering#8)

compiler/node_modules/.vite/vitest/results.json

@@ -1 +1 @@
-{"version":"2.1.9","results":[[":__tests__/parser.test.ts",{"duration":38.49205900000004,"failed":false}],[":src/__tests__/compiler.test.ts",{"duration":10.381641000000002,"failed":false}]]}
+{"version":"2.1.9","results":[[":__tests__/parser.test.ts",{"duration":41.041000999999994,"failed":false}],[":__tests__/e2e-wasm.test.ts",{"duration":108.24758300000002,"failed":false}],[":src/__tests__/compiler.test.ts",{"duration":10.95270800000003,"failed":false}]]}