fix: replace hardcoded absolute paths with root-relative paths in RoboDK Palletizing example

[Fahmid-Arman]

What type of PR is this?
/kind bug

What this PR does / why we need it:
The RoboDK Palletizing example previously contained hardcoded absolute paths tied to the original author's local environment (/root/ianvs/project/ianvs-0.3.0/examples/Palletizing/...). Furthermore, the directory name was incorrectly referenced as Palletizing instead of RoboDK Palletizing. This caused immediate failures for any new user attempting to run the benchmark.

Changes implemented:

• Configuration Remediation: Updated benchmarkingjob.yaml, testenv.yaml, and algorithm.yaml to utilize portable, root-relative paths (./examples/RoboDK Palletizing/...).
• Directory Name Correction: Fixed the incorrect Palletizing directory references in all configuration files to match the actual repository structure (RoboDK Palletizing).
• Documentation Overhaul: Updated the readme.md execution commands to run from the repository root, ensuring the relative paths resolve correctly. The ianvs -f command is now properly quoted to handle the space in the directory name.
• Dataset Path Alignment: Updated the dataset download instructions in readme.md to map directly to the new expected relative path (./examples/RoboDK Palletizing/singletask_learning_bench/dataset/RoboDK_Palletizing_Dataset/).

Which issue(s) this PR fixes:
This is a proactive fix for an unreported bug discovered during repository-wide path auditing.

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This pull-request has been approved by: Fahmid-Arman
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[gemini-code-assist]

Code Review

This pull request updates the RoboDK Palletizing single-task learning benchmark example by replacing absolute paths with relative paths, making the configuration self-contained and runnable from the repository root. It also updates the README instructions for downloading and unzipping the dataset. The feedback suggests adding a cd - command to the dataset setup script in the README to return the user to the repository root, ensuring the subsequent benchmarking command runs seamlessly.

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[Fahmid-Arman]

/assign @jaypume

[Fahmid-Arman]

Feedback addressed. Added cd - to the dataset configuration script to ensure users are returned to the repository root before executing the benchmark.