expanding tracing example to extract intensities

[Abinash-bit]

PR Description

This pull request enhances the existing example for tracing coronal loops using ~sunkit_image.trace.occult2 by adding functionality to extract and plot the intensity profiles along the traced loops. The primary goal is to demonstrate how to use the SkyCoord objects obtained from the tracing process to extract and visualize intensity profiles along the traced loops.

Key Changes

1. Tracing Coronal Loops: The first part of the code remains the same, where we trace coronal loops using the occult2 function.
2. Plotting Detected Loops: The detected loops are plotted on the original image.
3. Extracting Intensities: The new part of the code extracts the intensities along the first detected loop. This is done by converting the loop's pixel coordinates to SkyCoord objects and then sampling the intensity along these coordinates.
4. Plotting Intensity Profile: The intensity profile along the loop is plotted in a separate subplot, showing the intensity vs. angular distance.

Related Issues

This fixes #198

[nabobalis]

@nabobalis please review.

Please do not @ individuals unless it's important or if a PR is not reviewed after a week.

[Abinash-bit]

@nabobalis please review.

Please do not @ individuals unless it's important or if a PR is not reviewed after a week.

ohh sorry.

[nabobalis]

Thanks again @Abinash-bit