Build makefile to cross-compile eat for all os architures

[Tomilla]

1 Introduce

Right now there is no workflow for this project that automatically builds executables for all operating systems and architectures when a new version is released.

This is very important for those non-expert users (e.g. testers), we can't assume that all end-users are willing to clone the project locally and compile the desired platform artifacts themselves.

2 Features

I added makefile and github workflows for auto build artifacts in local and remote respectively.

2.1 add Makefile

build in local

2.2 add GitHub workflow

build in remote (via Github Action, just one click to run)

2.3 add build time and hash

• inject build time and hash when building exe(from git commit of current branch): for better issue report and troubleshot

Release Preview

Note: the workflow will also generate release note from commits between current version and last version.

Now you can easily share eat with your friends or coworkers, privately or publicly. :)