Extract smartblock into a standalone wasm plugin repo
Convert the bundled backend/internal/plugins/smartblock package into a
standalone reactor-mode wasm plugin:
- package smartblock -> package main; add wasip1 main.go with
wasmguest.Serve(Registration).
- Add go.mod (module git.dev.alexdunmow.com/block/smartblock) pinning
block/core v0.18.2; no replace directives.
- Flesh out plugin.mod (scope=ninja, kind=plugin, categories, tags,
display_name, description).
- Point web/eslint.config.js at ../../../cms/web/eslint.config.js and
switch @block-ninja/ui from workspace:* to the ^0.1.0 registry version;
rebuild web/dist.
- Add .gitignore (*.bnp, *.wasm, web/node_modules).
Behavior unchanged: registers the "smart" block; assets served from
web/dist. Builds to smartblock-1.0.0.bnp; check-safety passes.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>