[iOS][Wallet] Inject cardano dapp js base layer

[nuo-xu]

Add base CardanoProviderScript and it's handler and start injecting if Cardana dApp support feature flag is on.
This base provider js follows CIP-30 Cardano standard that defines necessary properties.
The handler doesn't handle any message yet. The actual message handling will in future PR(s)

Resolves brave/brave-browser#53034

Test

1. visit https://supermassive.github.io/ccvault-cip-0030-test/#/
2. tap Detect APIs
3. verify all checks pass in logs field. showing Wallet: Brave apiVersion: 1 and icon: Brave Icon

[brave-builds]

Warning

You have got a presubmit warning. Please address it if possible.

Found 3 lines longer than 80 characters (first 5 shown).

Items:

ios/brave-ios/Sources/Brave/Frontend/UserContent/UserScripts/Scripts_Dynamic/Scripts/Paged/WalletCardanoProviderScript.js, line 21, 99 chars
ios/brave-ios/Sources/Brave/Frontend/UserContent/UserScripts/Scripts_Dynamic/Scripts/Paged/WalletCardanoProviderScript.js, line 23, 90 chars
ios/brave-ios/Sources/Brave/Frontend/UserContent/UserScripts/Scripts_Dynamic/Scripts/Paged/WalletCardanoProviderScript.js, line 52, 4638 chars

[github-actions]

Chromium major version is behind target branch (145.0.7632.120 vs 146.0.7680.32). Please rebase.

[brave-builds]

Released in v1.89.86