Prep for publishing to crates.io, rename bin to bdkwallet

[notmandatory]

Description

In this PR I add some missing metadata to Cargo.toml to prepare for publishing to crates.io. I also renamed the repl.rs bin to bdk-cli to be consistent with similar tools in other projects.

Notes to the reviewers

See related PR to update the bitcoindevkit.org website docs to match updated bdk-cli.

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I ran cargo fmt and cargo clippy before committing

[RCasatta]

I am not strongly against renaming, however, I prefer bdk-cli like other CLI tools such as bitcoin-cli or lightning-cli

btw, I think you have a typo in the description bdwallet instead of bdkwallet

[notmandatory]

I am not strongly against renaming, however, I prefer bdk-cli like other CLI tools such as bitcoin-cli or lightning-cli

btw, I think you have a typo in the description bdwallet instead of bdkwallet

Thanks for the feedback, consistency with similar tools makes sense. I updated this PR to use bdk-cli and will put in a corresponding PR to update the website to match.

[notmandatory]

I also updated the app name in the --help to "BDK CLI".. last change I promise.

[notmandatory]

I added two more commits, one to set the bdk and bdk_macros versions so that I can push this crate to crates.io. And one to fix a broken rustdocs link. If no objections I'll merge this PR tomorrow and then publish it.