feat: add wutta top-level command with make-uuid subcommand

i think it only makes sense to have an "opinion" for command line
interface in this project, and we probably need more `wutta`
subcommands too but we'll see.

main motivation for this currently is to allow poser apps to define
their own CLI, in particular e.g. `poser install`

docs/narr/cli/scripts.rst

@@ -33,7 +33,7 @@ Run that like so:
 
 
 Better Standards
-----------------
+~~~~~~~~~~~~~~~~
 
 Keeping it simple, but improving that script per recommended patterns::
 
@@ -69,7 +69,7 @@ that this also gives you access to the :term:`app handler`::
    def hello(config):
        app = config.get_app()
        print('hello', config.get('hello.name'))
-       print('from', app.appname)
+       print('from', app.get_title())
 
    if __name__ == '__main__':
        config = make_config('my.conf')
@@ -81,7 +81,7 @@ Output should now be different:
 
    $ python hello.py
    hello George
-   from wutta
+   from WuttJamaican
 
 You are likely to need more imports; it is generally wise to do those
 *within the function* as opposed to the top of the module.  This is to
@@ -97,7 +97,7 @@ before all packages are imported::
 
        app = config.get_app()
        print('hello', config.get('hello.name'))
-       print('from', app.appname)
+       print('from', app.get_title())
 
        something(config)
 
@@ -143,7 +143,7 @@ Here is the script with logging incorporated::
        log.debug("saying hello")
        app = config.get_app()
        print('hello', config.get('hello.name'))
-       print('from', app.appname)
+       print('from', app.get_title())
 
        log.debug("about to do something")
        if something(config):