Refactor: normalize internal name usage

Any names that are fully internally-controlled should be normalized for input:

• Command names and input parameters
• Item priority names

Extend this to attempt reducing the necessity of " for parsing command inputs; if normalization is consistent enough, known single-parameter command inputs (e.g., !world "name") may be able to accept values verbatim; however, this may not be possible for commands that require multiple parameters, where explicit " is necessary to identify where one parameter ends and the next begins.

Other names that are provided externally - e.g. world names, item names, etc - must still be used verbatim.