Add "Keyring" tab to the options dialog. The tab displays the keys from
the table model (notes and certificates) and lets users create and
delete keys.

Key generation dialog includes passphare confirmation and a note.

* float scaling

* float scaling factor

* aooptions float

* doublespinbox

* header file double

* double it up

* clamp to 0.1

* Playerlist QoL

* Remove excessive whitespaces

* Add placeholder when displayname is unavailable

* Fix transformation mode for layers

Resolve #997

* always use smooth transform resampling for stretched images

* Used fixed frame size

* Implemented resize mode changes

Resolve #999

* Added alias to pixel resize mode

* Added user option

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Co-authored-by: in1tiate <32779090+in1tiate@users.noreply.github.com>

* Ported the project to CMake
  * Android and Mac support dropped for the time
being.
  * Tests, BASS and Discord-RPC are now options
* Restructured and reformated the project.
  * Merged `include` and `src`
  * Renamed `resource` to `data`
  * Renamed various files
  * External libraries headers are no longer included in `src`
  * Replaced header guards with #pragma once
  * Multiple refactors (keywords, headers)
  * Added Qt6 compatibility
* Removed various unused functions and headers
* Reworked AOPacket
  * When content is passed to AOPacket, it should be ensured that the content is already decoded.
  * Encoding/decoding are now static methods.
* Fixed various memory leaks
* Removed animation code for AOImage
  * AOImage is always using static images
* Simplified ChatLogPiece