fix(deps): pin llama-index-cli to resolve dependency conflict (#423)

This PR resolves a dependency installation failure that occurs when upgrading `llama-index` to version `0.14.8` (#390).

#### Problem

The upgrade to `llama-index==0.14.8` introduced a conflict with one of its transitive dependencies, `llama-index-cli`. The error arises because:

*   `llama-index==0.14.8` requires `llama-index-core>=0.14.8`.
*   The older version of `llama-index-cli` that was being selected by the installer requires `llama-index-core<0.14.0`.

These two requirements are mutually exclusive, causing the installation to fail.

#### Solution

This PR addresses the conflict by explicitly pinning the transitive dependency to a newer, compatible version. By adding `llama-index-cli==0.5.3` to the `requirements.txt` file, we instruct the package manager to use a version of the CLI tool that has updated its own dependencies to be compatible with the newer `llama-index` ecosystem.

Author: anubhav756

packages/toolbox-llamaindex/requirements.txt

@@ -1,6 +1,7 @@
 -e ../toolbox-core
 llama-index==0.14.4
+llama-index-cli==0.5.3
 PyYAML==6.0.3
 pydantic==2.11.10
 aiohttp==3.13.0
-deprecated==1.2.18
+deprecated==1.2.18