Update header and sub-header on Context sheet

[pjohnmeyer]

Scope

https://github.com/captable/ocx/files/11883157/OCX.v.1.0.xlsx

Desired Outcome

• As of date should come from OCF manifest
• "Generated on" date should come from OCF manifest
• "OCX Version" should read 1.0, not 0.5 like the reference sheet shows
• Update title

To-Do

• Determine necessary in-tool calculations and document for review and approval
• ocf-package: Are the necessary OCF Files being processed?
• model: Are the necessary OCF Objects being consumed?
• Develop workbook against Model interfaces.
• Implement actual Model
• Integrate and test end-to-end