Document transition process from Oscal 1.0.4 to 1.1.2

[AleJo2995]

Describe the bug

The intention is to document how the transition from older OSCAL version is going to happen in terms of branch and release handling and which implementations go to which branches depending on if it's a feature add, bug, etc.

To Reproduce

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1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

A clear and concise description of what you expected to happen.

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Environment

• OS: [e.g. iOS]
• Python version:
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