Deprecate state.final() and query(..., loc) + add missing panic for empty attribute + formatting

[quachpas]

@slashformotion What do you think about deprecating usage of state.final with a new user function register-glossary? Could be a step towards management of multiple glossaries at the same time.

 #import "@preview/glossarium:0.4.0": make-glossary, register-glossary, print-glossary, gls, glspl
 #show: make-glossary
+ #let entry-list = (...)
+ #register-glossary(entry-list)
... // Your document body
 #print-glossary(
- (
-   ...
- )
+  entry-list
 )