Add ARM builds

Adds Linux arm64 and Windows arm binaries

Initial preview release

The go-sqlcmd project will provide golang-based versions of essential SQL Server utilities to aid in development of cloud-native solutions based on Microsoft SQL Server and Azure SQL Database.
This release of sqlcmd provides a subset of the functionality of our existing sqlcmd application.
Additionally, it supports authentication using service principals and Azure Managed Identity via the new --authentication-method parameter.

Details on the application and its differences from the ODBC-based sqlcmd can be found in the README

Please try it out and provide feedback on the Issues or Discussions forum.

Sqlcmd v0.0.5

Initial version with minimal functionality.