Release v23.1.0

Tested with IDEA 2023.1

Release v22.3.0

Language agnostic document symbols (#68)

* first try to use file structure

* new document symbols

* new tests

* add icon manager initialize in completion tests

* determine class icon

* add completion test for imported class

* change workspace symbols

* delete unnecessary files

* little fixes

* change icon manager activate position

* remove redundant warning suppress

* remove redundant override

* remove redundant override

* rename document symbol test class

* remove redundant override

* make base class abstract