Add external plugin atlassian-twg-cli (#2980)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.github/plugin/marketplace.json

@@ -156,6 +156,35 @@
       "description": "Arize AX platform skills for LLM observability, evaluation, and optimization. Includes trace export, instrumentation, datasets, experiments, evaluators, AI provider integrations, annotations, prompt optimization, and deep linking to the Arize UI.",
       "version": "1.0.0"
     },
+    {
+      "name": "atlassian-twg-cli",
+      "description": "Installs and configures Atlassian Teamwork Graph CLI (`twg`) for use with GitHub Copilot. After setup, the CLI provides access to authorized work context across Jira, Confluence, Bitbucket, and connected tools.",
+      "version": "1.0.10",
+      "author": {
+        "name": "Atlassian",
+        "url": "https://www.atlassian.com"
+      },
+      "repository": "https://github.com/atlassian-labs/twg-plugins",
+      "homepage": "https://developer.atlassian.com/cloud/twg-cli/",
+      "license": "Apache-2.0",
+      "keywords": [
+        "atlassian",
+        "teamwork-graph",
+        "twg",
+        "jira",
+        "confluence",
+        "bitbucket",
+        "jsm",
+        "rovo",
+        "work-context",
+        "project-management"
+      ],
+      "source": {
+        "source": "github",
+        "repo": "atlassian-labs/twg-plugins",
+        "sha": "49f3a6f9c3fbcd4cd9edb5fd3282bb878322e447"
+      }
+    },
     {
       "name": "automate-this",
       "source": "plugins/automate-this",