feat: allow edit empty task from gantt panel

[jrainlau]

Jietu20250212-162315-HD.mp4

Edit empty task from gantt panel

PS: Could this repo turn on the ISSUE feature?

[sergioisidoro]

I was exploring this repo and your PR caught my eye. This is a nice feature, but I think it creates quite a big breaking change by changing the signature of the handleEditTask prop.

Why not accept a TaskOrEmpty in the arg of that function prop, making the transition much easier? I changed EditableTaskInfo to TaskOrEmpty with just a few changes and everything worked :) Still a breaking change, but a more gradual one.

Also note that you commited the packageManager and locked the vite plugin react to a tencent mirror (perhaps your org DNS is resolving to the mirror rather than the npm)