Add [Coderabbit] PR Stats service and tests

services/coderabbit/coderabbit-pull-request.service.js

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+import Joi from 'joi'
+import { BaseJsonService, pathParams } from '../index.js'
+
+const schema = Joi.object({
+  reviews: Joi.number().required(),
+}).required()
+
+class CodeRabbitPullRequest extends BaseJsonService {
+  static category = 'analysis'
+  static route = {
+    base: 'coderabbit',
+    pattern: 'prs/:provider(github|bitbucket|gitlab)/:org/:repo',
+  }
+
+  static openApi = {
+    '/coderabbit/prs/{provider}/{org}/{repo}': {
+      get: {
+        summary: 'CodeRabbit Pull Request Reviews',
+        description:
+          'This badge pulls the number of PRs reviewed by [CodeRabbit](https://coderabbit.ai), AI code review tool',
+        parameters: pathParams(
+          {
+            name: 'provider',
+            example: 'github',
+            description: 'Version Control Provider',
+            schema: { type: 'string', enum: this.getEnum('provider') },
+          },
+          {
+            name: 'org',
+            example: 'coderabbitai',
+            description: 'Organization or User name',
+          },
+          {
+            name: 'repo',
+            example: 'ast-grep-essentials',
+            description: 'Repository name',
+          },
+        ),
+      },
+    },
+  }
+
+  static defaultBadgeData = {
+    label: 'coderabbit reviews',
+  }
+
+  static render({ reviews }) {
+    return {
+      message: `${reviews}`,
+      color: 'blue',
+    }
+  }
+
+  async fetch({ provider, org, repo }) {
+    return this._requestJson({
+      schema,
+      url: `https://api.coderabbit.ai/stats/${provider}/${org}/${repo}`,
+      httpErrors: {
+        400: 'provider or repo not found',
+      },
+    })
+  }
+
+  async handle({ provider, org, repo }) {
+    const data = await this.fetch({ provider, org, repo })
+    return this.constructor.render(data)
+  }
+}
+
+export default CodeRabbitPullRequest

services/coderabbit/coderabbit-pull-request.tester.js

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+import Joi from 'joi'
+import { createServiceTester } from '../tester.js'
+
+export const t = await createServiceTester()
+
+t.create('live CodeRabbitPullRequest')
+  .get('/prs/github/coderabbitai/ast-grep-essentials.json')
+  .expectBadge({
+    label: 'coderabbit reviews',
+    message: Joi.number().min(0),
+  })
+
+t.create('live CodeRabbitPullRequest nonexistent org')
+  .get('/prs/github/not-valid/not-found.json')
+  .expectBadge({
+    label: 'coderabbit reviews',
+    message: 'provider or repo not found',
+  })
+
+t.create('live CodeRabbitPullRequest invalid repo')
+  .get('/prs/github/coderabbitai/invalid-repo-name.json')
+  .expectBadge({
+    label: 'coderabbit reviews',
+    message: 'provider or repo not found',
+  })