Make dataset names and aliases comparisons case-insensitive

[sergiimk]

Problem

• ODF restricts dataset name format to the grammar of domain names for compatibility with mechanisms like HTTP gateways and IPNS when dataset name appears in a subdomain. Subdomains are matched as case-insensitive.
• We likely don't want to allow datasets fooBar and FooBar and users alice and alIce to exist in our system due to risk of impersonation
• Finally the newly-introduced DatasetRefPattern also matches aliases as case-insensitive

Proposal

• Spell out how case (in)sensitivity works in ODF spec
• Equality checks of DatasetName and AccountName should be made case-insensitive
• DatasetRepository implementations should be updated to case-insensitive comparisons when detecting name collisions
• Along the way we should revisit how equality is implemented for composite types like DatasetRef, e.g. cases like DatasetRef::Alias("alice/foo") == DatasetRef::Handle("did:odf:abc", "alice/fool")

[khh7]

Hi! I'm looking for a good first issue to work on and thought this would be an interesting one. Can I work on this if possible?

[sergiimk]

Hi @khh7, thanks for considering to contribute!

This issue should be a good one to start with and we'll be happy to guide you through the process.

You can start with DEVELOPER.md to set up your development environment and get the tests running locally.

Once you've done that and ready to start on the issue - please assign it to yourself, so that no one else picks it up simultaneously.

Feel free to reach out on Discord if you need help.