Add grasp_synergy_adapter source entry to Jazzy

[shkwon98]

This PR adds grasp_synergy_adapter to ROS 2 Jazzy as a source entry.

This is a source-only addition for initial package naming review before
creating the corresponding release repository and performing the first
Bloom release.

Package name

grasp_synergy_adapter

Package upstream source

https://github.com/shkwon98/grasp_synergy_adapter

Purpose

grasp_synergy_adapter maps low-dimensional grasp commands to configurable
multi-joint hand trajectories. It provides standard JointTrajectoryController-
compatible endpoints and supports different robot hands through YAML
configuration without vendor-specific code.

Please Add This Package to be indexed in the rosdistro.

Jazzy

The source is here:

https://github.com/shkwon98/grasp_synergy_adapter

Checks

• All packages have a declared license in the package.xml
• This repository has a LICENSE file
• This package is expected to build on the submitted rosdistro

[github-actions]

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For changes related to rosdistro:

• ✅ New repositories are named appropriately

For changes related to yamllint:

• ✅ All new lines of YAML pass linter checks