feat: dynamically import codecs and hashers and remove from bundle

[SgtPooki]

Is your feature request related to a problem? Please describe.

When bundling this package, we want to make it possible for consumers to customize codecs and hashers. #415 made it possible to customize the links; now, we should allow consumers bundling this package to decide whether they want to import all the hashers & codecs or only some.

Describe the solution you'd like

• Everything in https://github.com/ipfs/ipld-explorer-components/blob/5c9718335e81cb3a06f7540a0be5135fe6355ad5/src/lib/codec-importer.ts should be imported dynamically
• Everything in https://github.com/ipfs/ipld-explorer-components/blob/master/src/lib/hash-importer.ts should be imported dynamically
• All dynamic imports should be marked as external in vite.config.ts so they're not included in the bundle
• All dynamic imports should be marked as optionalDependencies but we should have some minimum-required hashers & codecs as peerDependencies

Describe alternatives you've considered

• Include all imports not-dynamically: this increases bundle size and requires us to come edit this package any time we want to edit the explorer in explore.ipld.io or ipfs-webui

Additional context

This package is only included in ipfs-webui and explore.ipld.io, but we may wish to add new hashers, or remove others, and it would be nice if we could do that easily.

What is enabled by adding this feature

We will be able to allow further customization without as many edits to this package

This issue isn't tracking the work to customize hashers & codecs, but that should be the next step. Ideally we could pass functions into HeliaProvider or ExploreProvider to load hashers & codecs.