Warn the user when path casing doesn't match the casing of the underlying path on disk

Using this extension I am getting incorrect analysis reports such as:

The return type
'TimesheetDto (C:\\Users\\kent\\Repository\\<<redacted>>\\Src\\lib\\features\\timesheet\\dtos.dart)'
isn't a
'TimesheetDto (c:\\Users\\Kent\\Repository\\<<redacted>>\\Src\\lib\\features\\timesheet\\dtos.dart)'
, as defined by the method 'fromAppState'.

Neither flutter analyze nor IntelliJ report the same problems. I see no errors in the developer tooling (console).

My analysis log is here.

[DanTup]

I tried fixing it up automatically, but it needs doing in both directions (if Code gets an error for a mismatched path, it’ll open “another copy” of the file); so the warning is the best we can do.

[DanTup]

v2.13 has a warning when you open a folder that has a mismatched path like this.