feat: external infoview improvements

[onriv]

Some refactor, making the contract cleaner, and dynamic loading for widgets support, check here and here

[github-actions]

Qodana Community for JVM

188 new problems were found

Inspection name	Severity	Problems
Unused symbol	🔶 Warning	46
Redundant semicolon	🔶 Warning	29
Unused import directive	🔶 Warning	28
Unstable API Usage	🔶 Warning	19
Redundant nullable return type	🔶 Warning	4
Local 'var' is never modified and can be declared as 'val'	🔶 Warning	3
Constructor parameter is never used as a property	🔶 Warning	2
Usage of redundant or deprecated syntax or deprecated symbols	🔶 Warning	2
Redundant string template	🔶 Warning	2
Unresolved reference in KDoc	🔶 Warning	1
'catch' block may ignore exception	🔶 Warning	1
Redundant diagnostic suppression	🔶 Warning	1
Obvious explicit type	🔶 Warning	1
Redundant 'suspend' modifier	🔶 Warning	1
Redundant visibility modifier	🔶 Warning	1
Unused receiver parameter	🔶 Warning	1
Class member can have 'private' visibility	◽️ Notice	28
Accessor call that can be replaced with property access syntax	◽️ Notice	6
Unnecessary '@OptIn' annotation	◽️ Notice	3
Class naming convention	◽️ Notice	2
Redundant curly braces in string template	◽️ Notice	2
Negated call can be simplified	◽️ Notice	2
Return or assignment can be lifted out	◽️ Notice	1
Private property naming convention	◽️ Notice	1
Redundant 'if' statement	◽️ Notice	1

💡 Qodana analysis was run in the pull request mode: only the changed files were checked

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