chore(deps): bump @letta-ai/letta-client from 1.7.6 to 1.7.7 (#63)

Bumps [@letta-ai/letta-client](https://github.com/letta-ai/letta-node) from 1.7.6 to 1.7.7.
- [Release notes](https://github.com/letta-ai/letta-node/releases)
- [Changelog](https://github.com/letta-ai/letta-node/blob/main/CHANGELOG.md)
- [Commits](https://github.com/letta-ai/letta-node/compare/v1.7.6...v1.7.7)

---
updated-dependencies:
- dependency-name: "@letta-ai/letta-client"
  dependency-version: 1.7.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -38,8 +38,8 @@
   "dependencies": {
     "@clack/prompts": "^0.11.0",
     "@hapi/boom": "^10.0.1",
-    "@letta-ai/letta-client": "^1.7.6",
-    "@letta-ai/letta-code-sdk": "^0.0.4",
+    "@letta-ai/letta-client": "^1.7.7",
+    "@letta-ai/letta-code-sdk": "^0.0.3",
     "@types/express": "^5.0.6",
     "@types/node": "^25.0.10",
     "@types/node-schedule": "^2.1.8",
@@ -50,7 +50,6 @@
     "gray-matter": "^4.0.3",
     "node-schedule": "^2.1.1",
     "open": "^11.0.0",
-    "openai": "^6.17.0",
     "qrcode-terminal": "^0.12.0",
     "telegram-markdown-v2": "^0.0.4",
     "tsx": "^4.21.0",