refactor(core): Extract playground modal styles to separate file #5613

Job	Run time
Ready-to-merge gate / Missing "ready-to-merge" label	3s
auth_token_check / auth_token_check	4s
diff_check	0s
detect-changes	0s
Build RN ${{ matrix.rn-version }} ${{ matrix.rn-architecture }} ${{ matrix.engine }} ${{ matrix.platform }} ${{ matrix.build-type }} ${{ matrix.ios-use-frameworks }}	-1s
metrics	-1s
Test RN ${{ matrix.rn-version }} ${{ matrix.rn-architecture }} ${{ matrix.engine }} ${{ matrix.platform }} ${{ matrix.build-type }} ${{ matrix.ios-use-frameworks }}	-1s
	4s

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