feat: add core role system data structure

- Add comprehensive roles.js with W3C ARRM role definitions
- Add rolePairs.js for role page generation
- Add groupPairsEn.js and groupPairsFr.js for role group organization
- Define 13 accessibility roles across 4 role groups
- Include bilingual role labels and detailed job descriptions

Author: shawnthompson

src/_data/groupPairsEn.js

@@ -0,0 +1,19 @@
+module.exports = () => {
+	const roles = require("./roles.js");
+	return Object.entries(roles.groups.en).map(([key, name]) => {
+		// Get all role keys that belong to this group
+		const roleKeysInGroup = Object.entries(roles.roles)
+			.filter(([, meta]) => meta.group === key)
+			.map(([roleKey]) => roleKey);
+
+		// Get the translated labels for these roles
+		const roleLabels = roleKeysInGroup.map(roleKey => roles.labels.en[roleKey]);
+
+		return [
+			key,
+			name,
+			roles.descriptions.en[key],
+			roleLabels
+		];
+	}).sort();
+};

src/_data/groupPairsFr.js

@@ -0,0 +1,19 @@
+module.exports = () => {
+	const roles = require("./roles.js");
+	return Object.entries(roles.groups.fr).map(([key, name]) => {
+		// Get all role keys that belong to this group
+		const roleKeysInGroup = Object.entries(roles.roles)
+			.filter(([, meta]) => meta.group === key)
+			.map(([roleKey]) => roleKey);
+
+		// Get the translated labels for these roles
+		const roleLabels = roleKeysInGroup.map(roleKey => roles.labels.fr[roleKey]);
+
+		return [
+			key,
+			name,
+			roles.descriptions.fr[key],
+			roleLabels
+		];
+	}).sort();
+};

src/_data/rolePairs.js

@@ -0,0 +1,6 @@
+// Build an array of [roleKey, roleMeta] tuples from roles.roles
+module.exports = () => {
+	const rolesData = require("./roles.js"); // same folder as this file
+	// rolesData.roles is an object like { contentAuthoring: { group: "author" }, ... }
+	return Object.entries(rolesData.roles).sort(([a], [b]) => a.localeCompare(b));
+};