Deprecate @react-spring/zdog, @react-spring/konva, and @react-spring/native

[joshuaellis]

After reviewing npm download numbers and adjusting for the umbrella react-spring package (which pulls in all targets and inflates their counts by ~814K/week), the estimated direct weekly installs are:

Package	Raw downloads	Minus umbrella	Est. direct installs
@react-spring/web	~4.9M	-814K	~4.1M
@react-spring/three	~1.6M	-814K	~789K
@react-spring/native	~459K	-814K	~0
@react-spring/konva	negligible	-814K	~0
@react-spring/zdog	negligible	-814K	~0

Deprecate and remove the following platform targets:

• @react-spring/zdog — zdog itself is barely maintained, near-zero direct usage
• @react-spring/konva — only 3 npm dependents, no meaningful direct adoption
• @react-spring/native — download count is entirely explained by the umbrella; near-zero direct installs

[joshuaellis]

would close:

• react-native useNativeDriver #299
• [bug]: Animation flickers on React Native New Architecture #2369
• [bug]: Dynamic require of "react-native" is not supported on react native web #2250
• Use Reanimated on React Native #764