[knx] Refactoring of KnxCoreTypeMapper and UOM Support (#14534)

* [knx] Refactoring, add basic support for UOM

Preparation for refactoring KnxCoreTypeMapper.
Carryover from smarthomej/addons#107.
Merge UOM implementations.

* [knx] Adapt tests

DPT strings for QuantityType now strip off a tailing .0 when decimals
are converted.

* [knx] Refactoring

Use pattern matching with instanceof operator (new Java17 feature).

* [knx] Refactoring, performance improvements

Introduce KNXChannel class.
Carryover from smarthomej/addons#114.

* [knx] Add warning for incompatible DPT type

Configuring incompatible DPT/channel combinations (e.g. DPT 1.005 (alarm) on Contact channels
or DPT 1.019 (windows/door) on Switch channels) is not allowed but was silently ignored.
This PR adds a warning in case incompatible configurations are detected.

Carryover from smarthomej/addons#203.

* [knx] Add full support for UoM

Replace UoM handling with the implementation from smarthome/j.
Carryover from smarthomej/addons#206.

* [knx] Refactor KNXCoreTypeMapper, add RGBW and xyY

Carryover from smarthomej/addons#208.

* [knx] Fix RGB conversion

Carryover from smarthomej/addons#219.

* [knx] Remove workarounds obsoleted by Calimero 2.5

Carryover from smarthomej/addons#226.

* [knx] Add parameter for disabling incoming UoM

Carryover from smarthomej/addons#230.

* [knx] Fix fallback to DecimalType in number conversion

Carryover from smarthomej/addons#279.

* [knx] Fix DPT 251.600 decoding

Carryover from smarthomej/addons#349.

* [knx] Fix UoM handling for special types
* [knx] Add test for KNXChannelFactory
* [knx] Update CODEOWNERS for knx
* [knx] Default conversion for DPT 5.001 and 6.001
* [knx] Fix write blocked forever after read from bus

Carryover from smarthomej/addons#299 and smarthomej/addons#330.

* [knx] Use new class ColorUtil from core for HSB conversion

Also-by: Jan N. Klug <github@klug.nrw>
Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

CODEOWNERS

@@ -159,7 +159,7 @@
 /bundles/org.openhab.binding.kaleidescape/ @mlobstein
 /bundles/org.openhab.binding.keba/ @kgoderis
 /bundles/org.openhab.binding.km200/ @Markinus
-/bundles/org.openhab.binding.knx/ @kaikreuzer
+/bundles/org.openhab.binding.knx/ @kaikreuzer @holgerfriedrich
 /bundles/org.openhab.binding.kodi/ @pail23 @cweitkamp
 /bundles/org.openhab.binding.konnected/ @volfan6415
 /bundles/org.openhab.binding.kostalinverter/ @cschneider