feat: new walletconnect provider (#27)

Description
---
* Adds a new provider for WalletConnect
* Removed the `example` web page, as we already have [a project or that
purpose](https://github.com/tari-project/tari-template-web).

Motivation and Context
---
See tari-project/tari-dan#1083 and
tari-project/tari-template-web#6 for more
context

How Has This Been Tested?
---
This can only be tested alongside the changes in the tari wallet daemon
to support WalletConnect:
tari-project/tari-dan#1083

What process can a PR reviewer use to test or verify this change?
---
See previous section

Breaking Changes
---

- [x] None
- [ ] Requires data directory on base node to be deleted
- [ ] Requires hard fork
- [ ] Other - Please specify

---------

Co-authored-by: Stan Bondi <[email protected]>