Add `SDL3` bootstrap (alongside `SDL3`, `SDL3_ttf`, `SDL3_mixer`, `SDL3_image` recipes) for Kivy `3.0.0` #2100

Job	Run time
Flake8 tests	22s
documentation	17s
format('Build test APP [ {0} \| {1} ]', matrix.runs_on, matrix.bootstrap.name)	0s
format('Pytest [Python {0} \| {1}]', matrix.python-version, matrix.os)	0s
format('Test updated recipes for arch {0} [ ubuntu-latest ]', matrix.android_arch)	0s
format('Build test APP [ {0} \| {1} ]', matrix.runs_on, matrix.bootstrap.name)	0s
format('Test updated recipes for arch {0} [ {1} ]', matrix.android_arch, matrix.runs_on)	0s
coveralls_finish	0s
	39s

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