Tech: Add Action to publish a pre-release nuget package on PR merges

[KoditkarVedant]

Is your feature request related to a problem? Please describe.
We do releases based on the milestones, that works fine, but in many cases there are few bug fixes, improvements that we merge are delayed until we perform a milestone release, that could sometimes take time. Having a way to auto publish a pre-release nuget package on merge of PR would be great way to allow user of the library to get those fixes/improvement early without waiting for milestone build.

Describe the solution you'd like
GitHub action workflow, that would trigger on PR merge, that will create a pre-release nuget package and publish it.

Additional context
This help avoid tickets like #430