Fix plugin versioning, references to bao on CLI, version number

[cipherboy]

This fixes how bao sees itself, reporting OpenBao / bao in a lot of places:

$ bao version
OpenBao v1.14.9 ('d4039b3c9fdbf17b3e726342a8e8ffee81c9ecc0+CHANGES'), built 2024-02-08T21:35:04Z
$ bao plugin list
Name                            Type        Version
----                            ----        -------
approle                         auth        v1.14.9+builtin.bao
cert                            auth        v1.14.9+builtin.bao

... additional output elided ...

$ bao plugin -help
Usage: bao plugin <subcommand> [options] [args]

  This command groups subcommands for interacting with Vault's plugins and the
  plugin catalog. The plugin catalog is divided into three types: "auth", 
  "database", and "secret" plugins. A type must be specified on each call. Here 
  are a few examples of the plugin commands.

  List all available plugins in the catalog of a particular type:

      $ bao plugin list database

... additional output elided ...

It also fixes some more places where OpenBao should be returned, in certain (longer) error messages. Also, I finally do the make fmt over the entire combined codebase in this PR.