Add option to CLI to allow user to specify the manifest file

[fnwiya]

Resolves https://github.com/Open-Cap-Table-Coalition/ocx/issues/29

[fnwiya]

@pjohnmeyer @daviidy Hi, I am a member of Startup Data Standardization Association of Japan ( https://www.startupstandard.org/en ). I am working to promote OCF in Japan, so please let me contribute to your development activities.

[pjohnmeyer]

@fnwiya Thank you for the PR.

Is the Startup Data Standardization Association of Japan, or is your employer, a member of the Open Cap Table Coalition? We may need to coordinate some contribution assignment agreements.

@arthur-clara please add this to the agenda for Thursday.

[fnwiya]

Thank you for your comment. Yes, we are members of the Open Cap Table Coalition.

[pjohnmeyer]

Yes, we are members of the Open Cap Table Coalition.

Thank you, apologies for missing that.