feat: Linear front end (#9491)

Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>

app/javascript/dashboard/api/integrations/linear.js

@@ -0,0 +1,46 @@
+/* global axios */
+
+import ApiClient from '../ApiClient';
+
+class LinearAPI extends ApiClient {
+  constructor() {
+    super('integrations/linear', { accountScoped: true });
+  }
+
+  getTeams() {
+    return axios.get(`${this.url}/teams`);
+  }
+
+  getTeamEntities(teamId) {
+    return axios.get(`${this.url}/team_entities?team_id=${teamId}`);
+  }
+
+  createIssue(data) {
+    return axios.post(`${this.url}/create_issue`, data);
+  }
+
+  link_issue(conversationId, issueId) {
+    return axios.post(`${this.url}/link_issue`, {
+      issue_id: issueId,
+      conversation_id: conversationId,
+    });
+  }
+
+  getLinkedIssue(conversationId) {
+    return axios.get(
+      `${this.url}/linked_issues?conversation_id=${conversationId}`
+    );
+  }
+
+  unlinkIssue(linkId) {
+    return axios.post(`${this.url}/unlink_issue`, {
+      link_id: linkId,
+    });
+  }
+
+  searchIssues(query) {
+    return axios.get(`${this.url}/search_issue?q=${query}`);
+  }
+}
+
+export default new LinearAPI();