CIP-0030 normalize wallet names

[GGAlanSmithee]

Creating an issue with the intent to create a CIP unless there is some obvious reason not to.

See the image below; the window.cardano[name] and window.cardano.[name].name can differ in case (and perhaps in other ways as well). This makes it unnecessarily hard to dynamically iterate available wallets, with the intent to window.cardano[key].enable() it.

I suggest to normalize the names to always be lowercase, and fully match the key they are registered under. If needed, we could instead add an additional property, key which must match the corresponding key in window.cardano.

The point against this is that this can be derrived by the key itself, but this just adds more complexity where it does not need to be.

CC @alessandrokonrad

[GGAlanSmithee]

to elaborate on my own counter-point why this might not be needed, it can easily be achieved in user-land, like here
https://github.com/GGAlanSmithee/use-cardano/blob/main/src/hooks/use-wallet-providers.tsx#L29:

const providers = Object.keys(window.cardano)
  .map((key) => ({
    key,
    ...window.cardano[key],
  }))
 .filter(filterAvailableProviders)

[rphair]

@GGAlanSmithee referencing #446 since it looks like there is some improvement being made in this area.