feat(frontend): add telegram integration (#491)

* feat(frontend): add telegram notification agent

* feat(telegram): add i18n keys for telegram

* style(telegram): change message formatting in notification

* feat(telegram): add short tutorial for telegram setup

* feat(telegram): add i18n keys for telegram tutorial

* style(telegram): correct grammar in infobox

Co-authored-by: sct <ryan@sct.dev>

* fix(telegram): redo i18n extraction

Co-authored-by: Jakob Ankarhem <jakob.ankarhem@jetshop.se>
Co-authored-by: sct <ryan@sct.dev>

overseerr-api.yml

@@ -855,6 +855,22 @@ components:
           properties:
             webhookUrl:
               type: string
+    TelegramSettings:
+      type: object
+      properties:
+        enabled:
+          type: boolean
+          example: false
+        types:
+          type: number
+          example: 2
+        options:
+          type: object
+          properties:
+            botAPI:
+              type: string
+            chatId:
+              type: string
     NotificationEmailSettings:
       type: object
       properties:
@@ -1635,6 +1651,52 @@ paths:
       responses:
         '204':
           description: Test notification attempted
+  /settings/notifications/telegram:
+    get:
+      summary: Return current telegram notification settings
+      description: Returns current telegram notification settings in JSON format
+      tags:
+        - settings
+      responses:
+        '200':
+          description: Returned telegram settings
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/TelegramSettings'
+    post:
+      summary: Update telegram notification settings
+      description: Update current telegram notification settings with provided values
+      tags:
+        - settings
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/TelegramSettings'
+      responses:
+        '200':
+          description: 'Values were sucessfully updated'
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/TelegramSettings'
+  /settings/notifications/telegram/test:
+    post:
+      summary: Test the provided telegram settings
+      description: Sends a test notification to the telegram agent
+      tags:
+        - settings
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/TelegramSettings'
+      responses:
+        '204':
+          description: Test notification attempted
   /settings/notifications/slack:
     get:
       summary: Return current slack notification settings