Port Net and SVG libraries from Ant to Gradle with Maven publishing (… #227

Job	Run time
Test Processing	3m 37s
(linux/x64) Create Processing Build	4m 49s
(windows/x64) Create Processing Build	5m 32s
(macos/x64) Create Processing Build	5m 5s
(linux/aarch64) Create Processing Build	3m 52s
(macos/aarch64) Create Processing Build	4m 48s
	27m 43s

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