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>

tools/oxlint/anti-slop/shared/scope.ts

@@ -0,0 +1,15 @@
+import type { ESTree, Scope, SourceCode, Variable } from "@oxlint/plugins";
+
+/** Resolve an identifier to its binding by walking lexical scopes upward. */
+export function resolveVariable(
+	sourceCode: SourceCode,
+	identifier: ESTree.IdentifierReference,
+): Variable | null {
+	let scope: Scope | null = sourceCode.getScope(identifier);
+	while (scope !== null) {
+		const variable = scope.set.get(identifier.name);
+		if (variable !== undefined) return variable;
+		scope = scope.upper;
+	}
+	return null;
+}