Refactor large mouse event handlers

[mfranzon]

Break down the onMouseDown function in floor2d.js into smaller, focused functions (e.g., separate vertex selection, line creation, and context menu logic)

[izhanlara]

@mfranzon Hi! @mfranzon ,
can I work on this issue?

[mfranzon]

@mfranzon Hi! @mfranzon , can I work on this issue?

Hey @izhanlaraagarcia, sure. Please open a PR once you think you have done!

[iamAmer]

Hi, @izhanlaraagarcia are you currently working on this issue, or i could start it?

[pranjalarora98]

@mfranzon can you please assign me this issue?

[izhanlara]

@iamAmer No, because you didn't assign it to me and I didn't see the message. I work,
regards

[izhanlara]

Hi, #45 You tell me

[izhanlara]

@iamAmer @mfranzon , you have been able to review the pr?

[izhanlara]

Hi everyone, I would like close that's issue, you have been able to review my PR? #45

[pcolt]

Hi @izhanlaraagarcia I am going to check it out now. And thanks for contributing!