feat: phase 0 foundation — monorepo scaffold, backend, frontend, CI, docker

Establishes the skeleton every later phase builds on: Go+Gin API with
zap logging, /api/healthz, SQLite+goose runner; Vite+React18+TS strict+
Tailwind v4 frontend with bento-mono theme tokens; openapi.yaml driving
a generated TS client; oxlint with vendored anti-slop rules; GitHub CI;
multi-stage Dockerfile -> 33.6MB distroless image; docker compose up
serves the blank board.


Generated with [Devin](https://devin.ai)

Authored By: TDvorak <[email protected]>
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

oxlint.config.ts

@@ -0,0 +1,21 @@
+import { defineConfig } from "oxlint";
+
+export default defineConfig({
+	ignorePatterns: [
+		".agents/**",
+		".claude/**",
+		"tools/oxlint/anti-slop/**",
+		"**/dist/**",
+		"**/node_modules/**",
+	],
+	jsPlugins: [
+		{ name: "anti-slop", specifier: "./tools/oxlint/anti-slop/index.ts" },
+	],
+	rules: {
+		"anti-slop/no-chained-type-assertions": "error",
+		"anti-slop/no-widen-then-assert": "error",
+		"anti-slop/no-unsafe-dictionary-type": "error",
+		"anti-slop/require-safety-comment-for-type-assertion": "error",
+		"anti-slop/no-known-value-widening": "error",
+	},
+});