Restructure Tutorial Image naming

[eduardo-proteinms]

This restructuring is automated so we can rerun if if we need to change the source before we merge this.

This PR changes the following:

• Moves icon/button images to shared folder
• Names all images which are not coming from Skyline using the format "s-name"
• All other images are renamed / renumbered to the format "s-#"

This will make it simpler to output images from tutorial tests with a counter for now. Also we can use the s- prefix to add alt text / anchors in html programmatically

Example:

[eduardo-proteinms]

Will rerun script once #3180 is merged

[brendanx67]

Looks great. Definitely an improvement on several levels. Please start the s-# with s-1 instead of s-0. These are not indices into an array. I know the # from s-# will not line up with "Figure #", but I still think it is better to have the s-# and Figure # both start with 1.

[brendanx67]

I have merged PR #3180

[eduardo-proteinms]

Looks great. Definitely an improvement on several levels. Please start the s-# with s-1 instead of s-0. These are not indices into an array. I know the # from s-# will not line up with "Figure #", but I still think it is better to have the s-# and Figure # both start with 1.

Numbering starts at 1 now. This should be ready for merge.