Wallet: Implementing Multi-wallet support (dev tracker)

[HumbleDeer]

Multi-wallet support is currently implemented on the daemon and/or RaptoreumCore CLI interface.
This Issue is for keeping track of additional changes and/or discussion of Multi-Wallet support.

Outline:

• Implement CLI support
• Implement GUI support
• Add documentation to repo about commands
• Add documentation to Raptoreum Docs (docs.raptoreum.com)
  https://github.com/Raptor3um/raptoreum-docs/issues/56

Please link past and presently pending issues and/or pull requests relating to this feature!

@Raptor3um (Charlie) this would be a good candidate for moving into a Project with a filter view, as there will be multiple PR's and/or issues regarding implementation/bugs across more than one repository.

[HumbleDeer]

Merge #13058: [wallet] createwallet RPC - create new wallet at runtime

f7e153e95 [wallets] [docs] Add release notes for createwallet RPC. (John Newbery)
32167e830 [wallet] [tests] Add tests for createwallet RPC. (John Newbery)
942131774 [wallet] [rpc] Add createwallet RPC (John Newbery)

Pull request description:
Adds a createwallet RPC to dynamically create a new wallet at runtime.
Includes tests and release notes.

Originally authored by DashCore dev team here and later merged into RaptoreumCore.