CIP-0030 | Add register to track accepted extensions

[Ryun1]

adds link to file with extensions table.

[rphair]

Glad to finally see this (though I thought we had more of them... I guess most are still candidates). Only potential issue is the formatting of CIP names which could be made more consistent with CIP references around Cardano literature, including other CIPs:

1. CIP number, more often than not, is 4 digits (though people often use less when typing)
2. a hyphen is generally used when concatenating the CIP name + title (we often use | but of course this messes up tables)... alternatively this could be split into 2 columns.

[rphair]

Suggested change

	| CIP-95 Web-Wallet Bridge - Conway ledger era | https://github.com/cardano-foundation/CIPs/tree/master/CIP-0095 | Extension to enable support for Conway ledger era and governance |
	| CIP-103 Web-Wallet Bridge - Bulk transaction signing | https://github.com/cardano-foundation/CIPs/tree/master/CIP-0103 | Extension to provide an additional endpoint for dApp to sign multiple transactions in bulk |
	| CIP-104 Web-Wallet Bridge - Account public key | https://github.com/cardano-foundation/CIPs/tree/master/CIP-0104 | Extension to provide an additional endpoint for dApp to get the extended account public key from a connected wallet |
	| CIP-106 Web-Wallet Bridge - Multisig wallets | https://github.com/cardano-foundation/CIPs/tree/master/CIP-0106 | Extension to provide a interface for dApps and Cardano Multisig-wallets |
	| CIP-0095 - Web-Wallet Bridge - Conway ledger era | https://github.com/cardano-foundation/CIPs/tree/master/CIP-0095 | Extension to enable support for Conway ledger era and governance |
	| CIP-0103 - Web-Wallet Bridge - Bulk transaction signing | https://github.com/cardano-foundation/CIPs/tree/master/CIP-0103 | Extension to provide an additional endpoint for dApp to sign multiple transactions in bulk |
	| CIP-0104 - Web-Wallet Bridge - Account public key | https://github.com/cardano-foundation/CIPs/tree/master/CIP-0104 | Extension to provide an additional endpoint for dApp to get the extended account public key from a connected wallet |
	| CIP-0106 - Web-Wallet Bridge - Multisig wallets | https://github.com/cardano-foundation/CIPs/tree/master/CIP-0106 | Extension to provide a interface for dApps and Cardano Multisig-wallets |