e30919ba3a7941e6f54e2f95e94533c05415d831 Create taproot descriptor template (Vladimir Fomene)
Pull request description:
### Description
This PR solves #836. This PR adds a P2TR
descriptor template and a BIP86 taproot
descriptor template. With this, users
can now create a taproot descriptor with templates.
### Checklists
#### All Submissions:
* [x] I've signed all my commits
* [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
* [x] I ran `cargo fmt` and `cargo clippy` before committing
#### New Features:
* [x] I've added tests for the new feature
* [x] I've added docs for the new feature
#### Bugfixes:
* [ ] This pull request breaks the existing API
* [ ] I've added tests to reproduce the issue which are now passing
* [x] I'm linking the issue being fixed by this PR
ACKs for top commit:
notmandatory:
ACK e30919ba3a7941e6f54e2f95e94533c05415d831
Tree-SHA512: ad171d29e1b22613a9fb5e6ed148d1d3002c76152df1b5aa94e24be134d08d7c90dda9560b7501a8df28e5a7076339745da627bbdde5ed6fa11eab3199c34a99
b184e351e5