feat: allows users specifying a message when saving

[gsilvapt]

Closes #31.

@AugustasV not sure how comfortable you are with testing this but this is the feature you requested. If you are unable to test it, I can merge this and we can test using the resulting binary.

Thanks a lot for your contribution.

[AugustasV]

I was using terratest for some projects, but not sure about that

[gsilvapt]

Seems a bit overkill for this.

I need to read more on how to release and install alpha/beta releases - sorry. For the time being, to try this build you would have to pull from this branch, run go build -o bin/pmz and run the commands with this binary bin/pmz ....

In case you are uncomfortable with this, I can prioritise what I mentioned first in this comment, so we can try having stable and alpha releases.

Thanks

[AugustasV]

Hi @gsilvapt Tried to do that, I run command without anything I get that

augustasv@augustasv-ProBook:~/Documents/zet$ ~/Documents/pmz/bin/pmz 
panic: "message" shorthand is more than one ASCII character

goroutine 1 [running]:
github.com/spf13/pflag.(*FlagSet).AddFlag(0xc00013e500, 0xc0001b8e60)
        /home/augustasv/go/pkg/mod/github.com/spf13/[email protected]/flag.go:864 +0x4bf
github.com/spf13/pflag.(*FlagSet).VarPF(0xdfc800, {0xa7a780, 0xc0001b0ac0}, {0x9b39c6, 0x1}, {0x9b515e, 0x7}, {0x9d29cc, 0x3d})
        /home/augustasv/go/pkg/mod/github.com/spf13/[email protected]/flag.go:831 +0x151
github.com/spf13/pflag.(*FlagSet).VarP(...)
        /home/augustasv/go/pkg/mod/github.com/spf13/[email protected]/flag.go:837
github.com/spf13/pflag.(*FlagSet).StringVarP(0x1, 0xc00013e200, {0x9b39c6, 0xc00013e200}, {0x9b515e, 0xc00013e200}, {0x9c0689, 0x9e9508}, {0x9d29cc, 0x3d})
        /home/augustasv/go/pkg/mod/github.com/spf13/[email protected]/string.go:42 +0x6e
github.com/spf13/pflag.(*FlagSet).StringP(...)
        /home/augustasv/go/pkg/mod/github.com/spf13/[email protected]/string.go:67
github.com/gsilvapt/pmz/cmd.init.2()
        /home/augustasv/Documents/pmz/cmd/save.go:86 +0xa

Actually I can't run any command, all the time getting this error. Issue with a branch because when I switched to main branch, built again, everything worked smooth.

[gsilvapt]

Sorry for that. Fixed it and it worked now. Tested locally. Going to merge the changes and you can install the latest version.
Thanks!