DALI-2 push button bindings to control gear targets (DaliBind) (#25073)

* DALI: bind DALI-2 push button events to control gear targets

Add command DaliBind<1..8> <device>,<instance>,<target>,<mode> to link
push button events (IEC 62386-301) from an input device instance to a
control gear target. Modes are Toggle, On, Off, Up and Down; Up and Down
start a fade on button press and stop it on release. The first matching
binding is executed. DaliBind<x> 0 removes a binding and DaliBind alone
lists them all.

Bindings are stored in the DALI settings file, packed as one uint32 per
slot, so they survive a restart.

* Describe how start-up brightness stored differently per short addres vs dali groups

RELEASENOTES.md

@@ -114,6 +114,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 
 ## Changelog v15.6.0.2
 ### Added
+- DALI-2 push button bindings to control gear targets with command `DaliBind` (toggle, on, off, up, down)
 - Support for GUI tooltip on touch media like phones and tablets
 - Support for TFA Dostmann Marbella 868MHz pool thermometer using a CC1101 [#24959](https://github.com/arendst/Tasmota/issues/24959)
 - Support for MI32 Xiaomi Mi Body Composition Scale (MIBCS/MIBFS) [#25049](https://github.com/arendst/Tasmota/issues/25049)