[Feature Request] Add opentrace to Flathub

[leohearts]

Is your feature request related to a problem? Please describe. 您所请求的功能是否和某个问题有关？如果有，请说明

No
Describe the solution you'd like 描述您想要的功能
build a flatpak version and use flathub bot to automate builds.

Describe alternatives you've considered (If applicable) 可能备选方案（如果有）
I'm currently working on it. Once finished, if you agree, we can make this official and add a flathub link to README :)

Additional context 补充说明

[Archeb]

Thank you for the work! I will certainly mention it on the readme file. However, as I have no experience using or maintaining flatpak packages, I am afraid that I can’t officially maintain it.

[leohearts]

Thank you for the work! I will certainly mention it on the readme file. However, as I have no experience using or maintaining flatpak packages, I am afraid that I can’t officially maintain it.

It's ok to be just a community build, so that users can search opentrace in flathub / their app store

[leohearts]

Done! flathub/flathub#4794
But since this app uses traceroute , we need org.freedesktop.Flatpak to provide cap_net_admin permission. This may or may not be accepted by flathub.