WIP: updates
WIP: cache on disk and autostart.
WIP: mail, keychain and more.
WIP: updated grpc version in go mod file.
WIP: user list.
WIP: RPC service placeholder
WIP: test C++ RPC client skeleton.
Other: missing license script update.
WIP: use Qt test framework.
WIP: test for app and login calls.
WIP: test for update & cache on disk calls.
WIP: tests for mail settings calls.
WIP: all client tests.
WIP: linter fixes.
WIP: fix missing license link.
WIP: update dependency_license script for gRPC and protobuf.
WIP: removed unused file.
WIP: app & login event streaming tests.
WIP: update event stream tests.
WIP: completed event streaming tests.
GODT-1554: qt C++ frontend skeleton.
WIP: C++ backend declaration.
wip: started drafting user model.
WIP: users. not functional.
WIP: invokable methods
WIP: Exception class + backend 'injection' into QML.
WIP: switch to VCPKG to ease multi-arch compilation, C++ RPC client skeleton.
WIP: Renaming and reorganisation
WIP:introduced new 'grpc' go frontend.
WIP: Worker & Oveerseer for thread management.
WIP: added log to C++ app.
WIP: event stream architecture on Go side.
WIP: event parsing and streamer stopping.
WIP: Moved grpc to frontend subfolder + use vcpkg for gRPC and protobuf.
WIP: windows building ok
WIP: wired a few messages
WIP: more wiring.
WIP: Fixed imports after rebase on top of devel.
WIP: wired some bool and string properties.
WIP: more properties.
WIP: wired cache on disk stuff
WIP: connect event watcher.
WIP: login
WIP: fix showSplashScreen
WIP: Wired login calls.
WIP: user list.
WIP: Refactored main().
WIP: User retrieval .
WIP: no shared pointer in user model.
WIP: fixed user count.
WIP: cached goos.
WIP: Wired autostart
WIP: beta channel toggle wired.
WIP: User removal
WIP: wired theme
WIP: implemented configure apple mail.
WIP: split mode.
WIP: fixed user updates.
WIP: fixed Quit from tray icon
WIP: wired CurrentEmailClient
WIP: wired UseSSLForSMTP
WIP: wired change ports .
WIP: wired DoH. .
WIP: wired keychain calls.
WIP: wired autoupdate option.
WIP: QML Backend clean-up.
WIP: cleanup.
WIP: moved user related files in subfolder. .
WIP: User are managed using smart pointers.
WIP: cleanup.
WIP: more cleanup.
WIP: mail events forwarding
WIP: code inspection tweaks from CLion.
WIP: moved QML, cleanup, and missing copyright notices.
WIP: Backend is not QMLBackend.
Other: fixed issues reported by Leander. [skip ci]
