Eduvpn-client

* Server list:
- Implement a "delisted" UI when a server is removed
- Implement discovery fetching startup and refreshing the list
* Makefile:
- Add sloc target
* Desktop files:
- Add "Category" to desktop files, by hamarituc
* WireGuard:
- Support PersistentKeepalive option
* Docs:
- Document firewalld ipv6 issue
* eduvpn-common >= 2.1.x && < 3.0.0 is now required

* Setup.cfg: Small fixes to ensure the UI package and the data files are added correctly

* UI: Add a ctrl+q shortcut (580)
* Keyring: Make run detection less often in the CLI such that it does not prompt you for a password when you e.g. pass `--help` (587)
* Search: Implement discovery searching and sorting using eduvpn-common, should be better than the previous algorithm
* Desktop files: Add StartupWMClass to fix missing icon in certain launchers, thanks phavekes (588)
* Building: Add `setup.cfg` & `setup.py` to allow building for older Python versions and distros. Minimize `pyproject.toml`
* WireGuard: Set allow LAN traffic to `False` by default to mitigate attacks like Tunnelvision & Tunnelcrack
* App: Make sure networkmanager state updates that are triggered outside of the app are handled better
* Bump eduvpn-common to 2.0.0

* Make dialog titles more consistent across the GUI
* Handle errors better in the GUI when one happens during connecting
* Improve failover UI but hanging in the connecting state until online detection returns, fixes 543
* Sort CLI server list views
* Update common to 1.99.2
* Move to pyproject.toml
* Move share data to eduvpn/data
* Use ruff for linting and formatting
* Rewrite the makefile
* Show a reconnect with TCP if not on TCP yet in connection info
* Rename "Add Other Server" to "Add Server" in the UI
* Make WireGuard support mandatory
* Add a small delay to start the failover procedure, default 1 second. Tweak this with `EDUVPN_FAILOVER_DELAY` env variable

* Update eduvpn-common to 1.99.1
* Implement WireGuard over TCP using Proxyguard
* Have the ability to cancel any NetworkManager operation in the UI, e.g. if it takes a long time for OpenVPN/WireGuard to connect, you can simply click the connection slider to cancel
* Convert the secure internet location button to a combobox
* Disable the search for a secure internet server if one is already configured
* Implement back button on choose profile page 453

* Make the OpenVPN/WireGuard DNS the maximum priority to avoid DNS from resolving through other interfaces