Feature to editMode: Add and Delete nodes

[BasaX]

Description

I've used the application and I've noticed that I didn't have the possibility of adding or deleting nodes from a created polygon, I found it an interesting addition that can improve the user experience so I worked on it.

I've added these changes to the editing mode, first I added a check on the letter ctrl to the mousedown event, if it's pressed and a node is clicked, it adds a new one. To achieve this I identify the current node and the next one, then I calculate the distance between them and add the node in the center, once this is done I redraw the lines to connect them and update the canvas.
Then I have added a check on the alt key, if it is pressed and you click on a node, it deletes it

Type of change

• New feature (non-breaking change which adds functionality)

How has this change been tested, please provide a testcase or example of how you tested the change?

I tested it on several ways running with live server and I've ensured the previous functinalities of the editMode still works.

Any specific deployment considerations

None that I can think of

Docs

• Docs updated? What were the changes:

[lrosemberg]

Hello @BasaX,

Thank you so much for your contribution! This looks like a great feature.

I noticed that you ran the linter for the project, which changed the indentation, quotes, and other code styles. Could you submit a commit with only the actual changes, excluding the code style adjustments? This would make it much easier to review what was modified.

Thank you!