refactor: rename `RCTMLN` to `MLRN` (#519) #22

Job	Run time
Codegen	27s
Build Library	31s
Lint ESLint	39s
Lint TSC	35s
Test	36s
Build React Native Android / Build	7m 15s
Build React Native iOS & Test with Detox / Build	22m 48s
Publish	0s
	32m 51s

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