chore: update roadmap

[dreamorosi]

Description of your changes

This PR updates the roadmap page that we publish in the docs. The updates include an indicative view of the themes we want to focus on for the remainder of this year.

Related issues, RFCs

Issue number: #1527

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my change is effective and works
• The PR title follows the conventional commit semantics

Breaking change checklist

Is it a breaking change?: NO

• I have documented the migration process
• I have added, implemented necessary warnings (if it can live side by side)

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[dreamorosi]

@mergify rebase

[mergify]

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