Open source suite-sync repository

[matejkriz]

@OriginalEveres & @vdovhanych, could you please track here what needs to be done to open-source this repo?

• License https://github.com/trezor/trezor-suite-sync/blob/main/LICENSE.md
• Change manifests to not expose db urls and remove it from history too

[matejkriz]

According to my discussion with @vdovhanych , there are currently no major blockers, so we can just go ahead with this.