README: Add instructions

Signed-off-by: Dhruva Gole <[email protected]>

Author: DhruvaG2000

README.md

@@ -6,19 +6,35 @@
 
 Arduino Core API module for zephyr leverages the power of Zephyr under an Arduino-C++ style abtraction layer thus helping zephyr new-comers to start using it without worrying about learning about new APIs and libraries. Visit this project's [official blog](https://dhruvag2000.github.io/Blog-GSoC22/) for documentation.
 
+## Adding Arduino Core API to Zephyr
+
+Add following entry to `west.yml` file in `manifest/projects` subtree of Zephyr:
+```
+# Arduino API repository.
+- name: Arduino-Core-Zephyr
+  path: modules/lib/Arduino-Zephyr-API
+  revision: dev
+  url: https://github.com/zephyrproject-rtos/gsoc-2022-arduino-core
+```
+
+and clone the repository by running
+
+```sh
+west update
+```
+
 To "complete" the core you need to copy or symlink the api folder from [this repo](https://github.com/arduino/ArduinoCore-API.git) to the target's ``cores/arduino`` folder:
 ```sh
 $ git clone [email protected]:arduino/ArduinoCore-API # Any location
 $ ln -s /<your>/<location>/ArduinoCore-API/api cores/arduino/.
 ```
 
-Maintainers:
+**Maintainers**:
 - beriberikix
 - szczys 
 - alvarowolfx
 
-Contributor(s):
-[DhruvaG2000](https://github.com/DhruvaG2000)
+**Contributor**: [DhruvaG2000](https://github.com/DhruvaG2000)
 
 ## License
 Please note that the current license is Apache 2. Previously it was LGPL 2.1 but after careful review it was determined that no LGPL code or derivates was used and the more permissive license was chosen.