plugins 0002: kicad_tools --ipc356 + --fab-components fab exporters

Two generic (manufacturer-agnostic) pcbnew-side subcommands for platform
manufacturing plugins: --ipc356 (IPC-D-356 netlist via IPC356D_WRITER) and
--fab-components (board metrics + per-footprint placement/BOM JSON —
absolute board coords, consumers apply their own conventions). Bumps the
kicad submodule for the diet keep-back of export_d356.cpp.

Also closes a CI cache gap: wasm-cache-hash never hashed wasm/**, so a
pure wasm/cli change would cache-hit stale output — { dir: "wasm" } is
now an input (busts the cache once on landing).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mr8PQ34yCfvEtEcwSUvLAV

scripts/deploy/wasm-cache-hash.mjs

@@ -59,6 +59,13 @@ const INPUTS = [
   // Per-tool compile recipes (compile flags / emcc link options).
   { dir: "scripts/kicad", match: /^build-.*\.sh$/ },
 
+  // The pcbjam-repo C++/CMake/shim sources compiled INTO the tools (bindings,
+  // cli mains, kiplatform, gl1, stubs, editor glue). These live outside the
+  // kicad/wx submodules, so without this entry a pure wasm/** edit (e.g. a
+  // new kicad_tools subcommand) would cache-hit stale output — plugins 0002
+  // shipped exactly that way before this entry existed.
+  { dir: "wasm" },
+
   // Dependency builds (boost/cairo/occ/... — the sysroot the wasm links against).
   { dir: "scripts/deps" },