Added logger to Object Detection node and Detector Plugins

[jasmeet0915]

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Name: Added logger to Object Detection node and Detector Plugins

Description 📖

This PR adds a logger member to the ObjectDetection Node, DetectorBase, and Plugins. All the scripts are updated for logging and default log directory is also set in run_devel.sh

Fixes #67

Type of change 📜

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• This change requires testing before it can be merged into the main/development branch

[sudo-deep]

Node logs not being written to file in ROS_LOGS_DIR, unknown ROS issue.
Rest of the changes are functional.