feat: add child actions menu and achievements feature design

- Introduced a new feature specification for displaying a menu with actions (Award Certificate, Award Badge) when a child's card is clicked in ParentView.
- Created a detailed plan for an achievements system, outlining phases for implementation, including achievement taxonomy, MVP set, and UX considerations.
- Added a template for future feature specifications to standardize documentation.

frontend/e2e/.auth/user-cc.json

@@ -2,20 +2,20 @@
   "cookies": [
     {
       "name": "refresh_token",
-      "value": "reYniSI2OIXUAcXkeBNTaaOD7MJOzNEhwxwSDO42bew",
+      "value": "G_lq6dT7MCHBDgoW18PimjumaPeyWi7hRSwj2WKA_JI",
       "domain": "localhost",
       "path": "/api/auth",
-      "expires": 1787504746.987795,
+      "expires": 1791672153.30646,
       "httpOnly": true,
       "secure": true,
       "sameSite": "Strict"
     },
     {
       "name": "access_token",
-      "value": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6ImUyZS1jY0B0ZXN0LmNvbSIsInVzZXJfaWQiOiJhNDQyY2E4Ni1lNGIzLTRjZjEtYThmYS0zNWJmYmZhNzk5NjYiLCJ0b2tlbl92ZXJzaW9uIjowLCJleHAiOjE3Nzk3Mzk1NDZ9.3zqjc9RdG9jpr5wbmhbqYUCvzxUl9d8tcc4EY1-BYJc",
+      "value": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbWFpbCI6ImUyZS1jY0B0ZXN0LmNvbSIsInVzZXJfaWQiOiJkMWU3MzM3OC04N2I4LTQ2ZjQtYmE2ZC1hMDdhYjE0YjFkOWUiLCJ0b2tlbl92ZXJzaW9uIjowLCJleHAiOjE3ODM5MDY5NTN9.9GiSopufAFJ7qa9Cu0AhYpUDfempiYayhLaYIA_IoSc",
       "domain": "localhost",
       "path": "/",
-      "expires": 1779739546.987748,
+      "expires": 1783906953.306413,
       "httpOnly": true,
       "secure": true,
       "sameSite": "Lax"
@@ -27,11 +27,11 @@
       "localStorage": [
         {
           "name": "authSyncEvent",
-          "value": "{\"type\":\"logout\",\"at\":1779728746835}"
+          "value": "{\"type\":\"logout\",\"at\":1783896153166}"
         },
         {
           "name": "parentAuth",
-          "value": "{\"expiresAt\":1779901547148}"
+          "value": "{\"expiresAt\":1784068953466}"
         }
       ]
     }