feat: improve intersect arc line icon and cursor

[DSCaskey]

This improves the tool icon and cursor for the Point - Intersect Arc and Line tool.

Change filenames:

• point_of_contact.png to point_intersect_arc_line.png
• pointcontact_cursor.png to point_intersect_arc_line_cursor.png

Changes icon and cursor from:

to:

Closes issue #1079

[what-the-diff[bot]]

🎉 PR Summary

Here's the breakdown of this fantastic pull request 🚀

• Fresh New Icons and Cursors for the "PointOfContact" Tool We replaced the previous "PointOfContact" tool icon and cursor with new ones throughout the application. You'll now see it in the GroupsWidget, HistoryDialog, and the MainWindow. Keep an eye open for the icon :/toolicon/32x32/point_intersect_arc_line.png and the cursor :/cursor/point_intersect_arc_line_cursor.png; they're here to improve your visual experience! 🎨

• New Files Added! 📂 We've introduced some fresh new graphic resources to the project's src/app/seamly2d/share/resources directory. These include high quality versions of our new cursor and icon for the "PointOfContact" tool (point_intersect_arc_line_cursor.png, point_intersect_arc_line_cursor@2x.png, point_intersect_arc_line.png, point_intersect_arc_line@2x.png). Also, there's a brand new SVG file (point_intersect_arc_line.svg) for added flexibility!

• Out with the Old, In with the New 🗑️➡️🆕 To keep everything clean and tidy, we've removed old, now-unused graphic files (pointcontact_cursor.png, pointcontact_cursor@2x.png, point_of_contact.png, point_of_contact@2x.png) related to the former "PointOfContact" tool.

• Keeping Everything Up-to-date 🔄 And of course, we've updated the resource file definition (cursor.qrc and toolicon.qrc), so now all references to the "PointOfContact" tool point towards our updated sparkly new graphics!

Overall, this is all about making the user interface more intuitive and beautiful 🌺. What an exciting makeover, isn't it? Keep up the great work, team! 🙌🏽