feat: add features to lsp

[koxudaxi]

Fixes: #297 #551 #546 #529 #506 #495 #491 #476 #443 #424 #416 #415 #297 #149

[github-actions]

Qodana Community for JVM

32 new problems were found

Inspection name	Severity	Problems
Usage of API marked for removal	🔴 Failure	3
Unused symbol	🔶 Warning	10
Incorrect string capitalization	🔶 Warning	3
Unstable API Usage	🔶 Warning	3
Usage of redundant or deprecated syntax or deprecated symbols	🔶 Warning	1
Unused import directive	🔶 Warning	1
Class member can have 'private' visibility	◽️ Notice	2
Package name does not match containing directory	◽️ Notice	2
Private property naming convention	◽️ Notice	2
Array property in data class	◽️ Notice	1
Redundant argument-based 'let' call	◽️ Notice	1
Const property naming convention	◽️ Notice	1
Lambda argument inside parentheses	◽️ Notice	1
Regular expression can be simplified	◽️ Notice	1

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