Add reference links

LINKS.md

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+## References
+
+The links below have various tutorials and guides for getting started with electronics, prototyping, Arduino and many more. 
+
+> **Note:** This list is non exhaustive.
+
+- Electronics tutorials: [https://www.electronics-tutorials.ws](https://www.electronics-tutorials.ws/)
+- [Arduino (Brand) Tutorial](https://www.arduino.cc/en/Tutorial/HomePage)
+- [Adafruit tutorials](https://learn.adafruit.com/)
+- [Sparkfun tutorials](https://www.sparkfun.com/tutorials/)
+- [Cyaninfinite tutorials](https://cyaninfinite.com/)
+- Project Ideas: [Instructables](https://www.instructables.com/)