feat: add a readonly properties handling eslint rule

[galargh]

• Because this PR includes a bug fix, relevant tests have been included.
• Because this PR includes a new feature, the change was previously discussed on an Issue or with someone from the team.
• I didn't do anything of this.

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This is a follow-up to #5971

It will be taken out of draft when all the new linting issues are resolved.

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Name	Status	Preview	Comments	Updated (UTC)
hardhat	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 22, 2024 1:36pm

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