use namespaced keywords for all re-frame event names in braid

[rafd]

Currently, we are using a mix of non-namespaced keywords (ie. :some-event) or custom-namespaced keywords (ie. `:foo/some-event).

Suggestion:

• when defining events, just use the local namespace (ie. ::some-event)

Pro:

• clarifies exactly where each event is defined

Con:

• verbosity when dispatching (ex. (dispatch [:braid.client.core.events/initialize]) vs. (dispatch [:core/initialize]))