Add shuttlecock 3D localizer node and dummy shuttlecock test script

[allenabraham106]

Humanoid Badminton Birdie Localization.

Implements the pixel → depth → 3D point piece of the badminton perception pipeline: takes a 2D detection and the aligned depth image, samples depth robustly around the detected pixel, and back-projects to a 3D point in the camera's optical frame.

TODO:

• Integrate Tracknet messages instead of dummy messages
• Integrate with trajectory planning

[Copilot]

@copilot fix linting

Addressed. Lint-related updates are in ac279c9, and the branch is now rebased with lint checks still passing.

@copilot rebase off main and then if still linting issue fix it

Done — this branch has been rebased onto main. Current head after rebase is c10065b, and lint remains clean.

[wilsonchenghy]

@copilot wait isn't the rebase supposed to make it only show the added lines by him but not other people, now it become +3000 lines

[Copilot]

@copilot wait isn't the rebase supposed to make it only show the added lines by him but not other people, now it become +3000 lines

You were right — the branch had duplicated upstream history, which inflated the PR diff. I rebased again onto main to drop already-upstream commits; head is now ee26473, and the branch is back to only these 4 commits/files for the shuttlecock work.