Add bash OTA

Signed-off-by: Hưng Phan <phandinhhungvp2001@gmail.com>

README.md

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+Read This Before Proceeding :-
+
+Clone the OTA repo in your ROM directory.
+To generate json and push OTA,
+```bash
+bash OTA/support/ota.sh <device_codename> <rom_folder> <maintainer_name> <maintainer_url> <forum_url>
+
+e.g.
+bash OTA/support/ota.sh wayne pex "Christian de la Cruz" https://t.me/chdelacr https://forum.xda-developers.com/
+```
+NOTES:
+- ROM directory will look for *home/<os_username>/<rom_folder>*.
+- Use double quotes for parameters with more than a single word, like maintainer name in the example above.
+- All parameters are mandatory.