Implemented dummy SegmentFromPoint, Integrated into web app

[amalnanavati]

Describe this pull request. Link to relevant GitHub issues, if any.

In service of #27 .

This PR implements a dummy SegmentFromPoint RSO2 action that takes in a user-specified point and returns 3 contender masks that contain that point. It also integrates this into the BiteSelection page, by letting the user click an arbitrary point, displaying the masks as buttons, and letting them select a mask to move on.

Explain how this pull request was tested, including but not limited to the below checkmarks.

I first tested the dummy action, ensuring that:

• In normal usage, it gives feedback as expected and then returns three masks.
• It cancels additional goals that come in while it is currently processing a goal.
• A goal can be canceled.
• Once it has finished a goal, it accepts the next goal.

I then tested its integration with the web app, by:

• Ensuring that a user can click a point on the image, it will call the action, display masks around that point, and clicking each button sets the corresponding mask to global state before moving on.
• Ensuring that if the user clicks multiple points, it doesn't register multiple callbacks.
• Ensuring that when the page is refreshed the action is canceled and action client is destroyed.
• Ensuring that when we change states the action client is destroyed.

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• Thoroughly test your code's functionality, including unintended uses.
• [N/A, Issue Make the App Fully Responsive #9 ] Thoroughly test your code's responsiveness by rendering it on different devices, browsers, etc.
• [N/A, doesn't change the user flow] Consider the user flow between states that this feature introduces, consider different situations that might occur for the user, and ensure that there is no way for the user to get stuck in a loop.

Before merging a pull request

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[amalnanavati]

Render the point the user clicked on as a reminder

EDIT: I spun off a new issue, #46 , for this.