feat: Detect unchanged feature states when saving versions

[kyle-ssg]

Thanks for submitting a PR! Please check the boxes below:

• I have added information to docs/ if required so people know about the feature!
• I have filled in the "Changes" section below?
• I have filled in the "How did you test this code" section below?
• I have used a Conventional Commit title for this Pull Request

Changes

Saving a versioned feature / segment overrides will now correctly detect changes before saving. This also means we can show an error to the user if their save contains no changes

How did you test this code?

Attempted to save segment overrides / features without changes

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Name	Status	Preview	Comments	Updated (UTC)
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 10, 2024 9:38am
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 10, 2024 9:38am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)			Sep 10, 2024 9:38am

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-4609	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-4609	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-4609	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4609	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4609	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-4609	Finished ✅	Results ✅

[github-actions]

Uffizzi Preview deployment-56077 was deleted.

[matthewelwell]

I've tested this manually using the preview, and given the code a quick look. All looks good to me.