feat: phase 2 api parity endpoints for extension

app/tests/Fixtures/emojis.fixture.json

@@ -0,0 +1,39 @@
+{
+  "emojis": [
+    {
+      "emoji": "😀",
+      "name": "grinning face",
+      "slug": "grinning-face",
+      "category": "Smileys & Emotion",
+      "subcategory": "face-smiling",
+      "supports_skin_tone": false,
+      "description": "A happy smiling face.",
+      "unified": "U+1F600",
+      "codepoints": ["1F600"],
+      "shortcodes": [":grinning_face:"],
+      "aliases": ["grin face"],
+      "keywords_en": ["happy", "smile"],
+      "keywords_id": ["senang", "senyum"],
+      "related": ["😃"],
+      "intent_tags": ["happiness"]
+    },
+    {
+      "emoji": "👍",
+      "name": "thumbs up",
+      "slug": "thumbs-up",
+      "category": "People & Body",
+      "subcategory": "hand-fingers-closed",
+      "supports_skin_tone": true,
+      "description": "A thumbs up gesture.",
+      "unified": "U+1F44D",
+      "codepoints": ["1F44D"],
+      "shortcodes": [":thumbsup:"],
+      "aliases": ["like"],
+      "keywords_en": ["ok", "good"],
+      "keywords_id": ["bagus"],
+      "related": ["👎"],
+      "intent_tags": ["approval"]
+    }
+  ]
+}
+