Update Readme file in AGE Viewer Go branch

[saadjameel]

I've added one Readme file with basic logos. For all interns of AGE viewer in Go, please edit and do the Pull Requests.
Note: Make sure you guys make a noticeable edition.

[Nimra-1234]

@saadjameel I'm not added in AGE Viewer Go branch ( https://github.com/apache/age/graphs/contributors ). Therefore can't do PR. Kindly add me .