react-native-start: add page (#5223)

pages/common/react-native-start.md

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+# react-native start
+
+> Command line tools to start the React Native server.
+> More information: <https://github.com/react-native-community/cli/blob/master/docs/commands.md#start>.
+
+- Start the server that communicates with connected devices:
+
+`react-native start`
+
+- Start the metro bundler with a clean cache:
+
+`react-native start --reset-cache`
+
+- Start the server in a custom port (defaults to 8081):
+
+`react-native start --port {{3000}}`
+
+- Start the server in verbose mode:
+
+`react-native start --verbose`
+
+- Specify the maximum number of workers for transforming files (default is the number of CPU cores):
+
+`react-native start --max-workers {{count}}`
+
+- Disable interactive mode:
+
+`react-native start --no-interactive`