Added annotation related changes made over the summer#4

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songpeize wants to merge 22 commits intoColumbiaCGUI:Annotationsfrom

Commits on Jun 19, 2023

Added basic annotation implementation
songpeize
committed

Commits on Jun 22, 2023

Commits on Jul 5, 2023

Added video playback and more canvas control
songpeize
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Commits on Jul 6, 2023

Fixed annotation pointer end position
songpeize
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Commits on Jul 7, 2023

Start working on annotation interface
songpeize
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Commits on Jul 10, 2023

Updated annotation pointer collider
songpeize
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Commits on Jul 13, 2023

Commits on Jul 14, 2023

Push the version before demo
songpeize
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Commits on Jul 27, 2023

Working on the gaze cone functionality
songpeize
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Commits on Aug 1, 2023

Added gaze sphere for object selection
songpeize
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Commits on Aug 9, 2023

Commits on Aug 28, 2023

Commits on Sep 6, 2023

Commits on Oct 2, 2023