more refactoring around Felt

[tcoratger]

Pull Request type

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Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Testing

What is the new behavior?

Does this introduce a breaking change?

• Yes
• No

[greged93]

I'm not too much into replacing Felt::from into into(), I don't think it brings much and removes some readability in the code

[tcoratger]

I'm not too much into replacing Felt::from into into(), I don't think it brings much and removes some readability in the code

@greged93 In fact my objective was to depend as little as possible on the word Felt because it can change, etc. depending on updates and with into the inference is automatic. But you're right, it limits readability.

So I reverted the changes to keep this readability but I kept the main refactor that I wanted to carry out at the start of this PR if you agree with this one.