feat!: update to manifest v3 (Resolves: #32, #33, #29)

[jobara]

Resolves: #32 Resolves: #33 Resolves: #29

The remaining TODOs are noted in the TODOs file.

Migration docs:

• Manifest V3 transition timeline
• Migrating to Manifest V3

[cindyli]

Closed as the work continues at https://github.com/fluid-project/uio-plus/pull/40