feat(seo): enhance multilingual support and SEO handling

- Added support for multiple languages in the frontend, including English, Spanish, and Cebuano, improving accessibility for a broader audience.
- Implemented hreflang links for better SEO performance, ensuring search engines can correctly index language-specific content.
- Updated SEO metadata handling to utilize internationalization keys, enhancing the clarity and relevance of page titles and descriptions.
- Refactored SEO utility functions to streamline the management of OpenGraph and hreflang attributes, improving maintainability and performance.

frontend/src/i18n/locales/en/seo.json

@@ -0,0 +1,51 @@
+{
+    "seo": {
+        "default": {
+            "title": "YourPart - Community, chat, forum, vocabulary trainer, Falukant and minigames",
+            "description": "YourPart brings together community, chat, forums, blogs, a vocabulary trainer, the browser builder game Falukant and minigames in one platform.",
+            "keywords": "YourPart, community, chat, forum, blog, vocabulary trainer, Falukant, minigames, free, private, privacy"
+        },
+        "home": {
+            "title": "YourPart - Community, chat, forum, blogs, vocabulary trainer and games",
+            "description": "YourPart is a community platform with chat, forums, blogs, a vocabulary trainer, the browser builder game Falukant and minigames.",
+            "keywords": "YourPart, community, chat, forum, blogs, vocabulary trainer, browser game, Falukant, minigames, free, private",
+            "jsonLdDescription": "Community platform with chat, forums, blogs, vocabulary trainer, Falukant and browser minigames."
+        },
+        "falukant": {
+            "title": "Falukant - Medieval browser builder game on YourPart",
+            "description": "Falukant is the medieval browser builder game on YourPart with trade, politics, family, education and character progression.",
+            "keywords": "Falukant, browser game, builder game, medieval game, economy game, politics game, YourPart, free",
+            "jsonLdDescription": "Medieval browser builder game with trade, politics, family and character progression.",
+            "jsonLdName": "Falukant"
+        },
+        "minigames": {
+            "title": "Minigames on YourPart - Match 3 and taxi in the browser",
+            "description": "Discover browser minigames on YourPart: Match 3 and taxi offer quick rounds directly on the platform.",
+            "keywords": "minigames, browser games, Match 3, taxi game, casual games, YourPart, free",
+            "jsonLdDescription": "Browser minigames on YourPart with Match 3 and taxi.",
+            "jsonLdCollectionName": "YourPart minigames"
+        },
+        "vocab": {
+            "title": "Vocabulary trainer on YourPart - learn languages online",
+            "description": "The YourPart vocabulary trainer helps you learn languages with interactive lessons, courses and exercises.",
+            "keywords": "vocabulary trainer, learn languages, online learning, language courses, exercises, YourPart, free",
+            "jsonLdDescription": "Interactive vocabulary trainer with courses, lessons and exercises for language learning.",
+            "jsonLdName": "YourPart vocabulary trainer"
+        },
+        "blogList": {
+            "title": "Blogs on YourPart - community posts and topics",
+            "description": "Explore public blogs on YourPart with community posts, ideas, experiences and topics from many areas.",
+            "keywords": "blogs, community blog, articles, posts, YourPart",
+            "jsonLdDescription": "Public blogs and community posts on YourPart.",
+            "jsonLdName": "Blogs on YourPart"
+        },
+        "blogPage": {
+            "title": "Blogs on YourPart",
+            "description": "Public blogs, posts and community content on YourPart.",
+            "keywords": "blog, YourPart, community"
+        },
+        "blogPost": {
+            "pageTitle": "{title} | Blog on YourPart"
+        }
+    }
+}