feature(docs): updated docs about DAO

[julien51]

Description

Updated the DAO docs, roadmap... etc.

Checklist:

• 1 PR, 1 purpose: my Pull Request applies to a single purpose
• I have commented my code, particularly in hard-to-understand areas
• I have updated the docs to reflect my changes if applicable
• I have added tests (and stories for frontend components) that prove my fix is effective or that my feature works
• I have performed a self-review of my own code
• If my code involves visual changes, I am adding applicable screenshots to this thread

Release Note Draft Snippet

[julien51]

@ccarfi you can check the build there https://65943e770e2d47033a4af45c--docs-unlock-protocol-com.netlify.app/governance/

[ccarfi]

Reviewing....