Merge bitcoindevkit/bdk#1928: chore: remove bdk_wallet and update readme and ci workflow

1d7ad3122e74266e0833d7b590eb3f7bf3882655 chore: rename example-crates directory to examples (Steve Myers)
cddc0f2d7248feffc4b1279e7b8ac160b5bcb920 chore: remove bdk_wallet and update readme and ci workflow (Steve Myers)

Pull request description:

  ### Description

  Removes the `bdk_wallet` crate from the workspace of this repo now that it's been moved to it's own repo.

  ### Notes to the reviewers

  I did a bit of extra cleanup on the README file. I replaced the crates list with a table that also includes badges for the crate version and docs.  I also renamed the `example-crates` folder to simply `examples`, a nit of mine that I already fixed in the new `bdk_wallet` repo.

  See: bitcoindevkit/bdk_wallet#18

  ### Changelog notice

  For the changelog for the next version of `bdk_wallet`:

  - The `bdk_wallet` crate has been removed from the `bdk` repository and move to it's own `bdk_wallet` repository.

  ### 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

ACKs for top commit:
  evanlinjin:
    ACK 1d7ad3122e74266e0833d7b590eb3f7bf3882655
  ValuedMammal:
    ACK 1d7ad3122e74266e0833d7b590eb3f7bf3882655
  luisschwab:
    ACK 1d7ad3122e74266e0833d7b590eb3f7bf3882655
  LagginTimes:
    ACK 1d7ad3122e74266e0833d7b590eb3f7bf3882655
  AmosOO7:
    ACK 1d7ad31

Tree-SHA512: 6b2dab3220cb6642bd0ea7fbcb211ab24ce68c64d3752883d61791b8b7ecafe4fb6a6fb70436fc3bcd57ff3fc1ab5a98c05205292dd66425bddb66d13155c2a1