Add filesystem permissions for SSB support

[TheChilledBuffalo]

Here's the draft PR for the feature in the Floorp-core repo: Floorp-Projects/Floorp-core#63

[flathubbot]

Started test build 109482

[flathubbot]

Build 109482 successful
To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/92313/one.ablaze.floorp.flatpakref

[dominichayesferen]

Won't it need read/write for SSB removal support?

[TheChilledBuffalo]

@dominichayesferen doesn't :create give that permission?

https://docs.flatpak.org/en/latest/sandbox-permissions-reference.html

[TheChilledBuffalo]

I'll also add :create to the icons folder.

[flathubbot]

Started test build 109566

[flathubbot]

Build 109566 successful
To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/92397/one.ablaze.floorp.flatpakref

[TheChilledBuffalo]

@typeling1578 Hey, may I ask why this was marked as a draft?

[flathubbot]

Started test build 109799

[flathubbot]

Build 109799 successful
To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/92627/one.ablaze.floorp.flatpakref

[dominichayesferen]

@typeling1578 Hey, may I ask why this was marked as a draft?

To prevent accidental early merging until the upstream PR is added in, pretty sure.

[TheChilledBuffalo]

Upstream PR has been merged!

[dominichayesferen]

bot, build

[flathubbot]

Queued test build for one.ablaze.floorp.

[flathubbot]

Started test build 111807

[flathubbot]

Build 111807 successful
To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/94621/one.ablaze.floorp.flatpakref