feat(i18n): canonical strings, data extraction and validation (phase 2)

Implement Phase 2 of i18n spec:
- Extract UI interface strings to messages/pt.json across 15 namespaces
- Extract canonical data files to data/pt/ (series, frameworks, conexoes)
- Create lib/data/pt/ modules (glossario, diagnostico, componentes, topicos)
- Implement lib/data/index.js async data loaders by locale
- Add automated check:i18n script to validate key parity and enforce no-book rules

Co-Authored-By: Antigravity <noreply@google.com>

lib/data/index.js

@@ -0,0 +1,64 @@
+/**
+ * Carregadores de dados organizados por locale (seção 6.2 da spec).
+ * Suporta pt, en, es, fr, de, zh-CN com fallback para pt.
+ */
+
+export async function getSeries(locale = "pt") {
+	try {
+		return (await import(`@/data/${locale}/series.json`)).default;
+	} catch {
+		return (await import("@/data/pt/series.json")).default;
+	}
+}
+
+export async function getFrameworks(locale = "pt") {
+	try {
+		return (await import(`@/data/${locale}/frameworks.json`)).default;
+	} catch {
+		return (await import("@/data/pt/frameworks.json")).default;
+	}
+}
+
+export async function getConexoes(key, locale = "pt") {
+	try {
+		return (await import(`@/data/${locale}/conexoes/${key}.json`)).default;
+	} catch {
+		try {
+			return (await import(`@/data/pt/conexoes/${key}.json`)).default;
+		} catch {
+			return [];
+		}
+	}
+}
+
+export async function getGlossario(locale = "pt") {
+	try {
+		return await import(`@/lib/data/${locale}/glossario.js`);
+	} catch {
+		return await import("@/lib/data/pt/glossario.js");
+	}
+}
+
+export async function getDiagnostico(locale = "pt") {
+	try {
+		return await import(`@/lib/data/${locale}/diagnostico.js`);
+	} catch {
+		return await import("@/lib/data/pt/diagnostico.js");
+	}
+}
+
+export async function getComponentes(locale = "pt") {
+	try {
+		return await import(`@/lib/data/${locale}/componentes.js`);
+	} catch {
+		return await import("@/lib/data/pt/componentes.js");
+	}
+}
+
+export async function getTopicos(locale = "pt") {
+	try {
+		return await import(`@/lib/data/${locale}/topicos.js`);
+	} catch {
+		return await import("@/lib/data/pt/topicos.js");
+	}
+}