`String.toPascalCase()` unexpected renaming for consecutive uppercase letters

[HaukeRa]

Describe the bug

The String.toPascalCase() function (used to normalize object and class names) produces unexpected renaming when applied to a string containing multiple consecutive uppercase letters.

https://github.com/analysis-dev/diktat/blob/759c26500de9c86c58af875f750017f14e3d2208/diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/StringCaseUtils.kt#L126

Example: IOSExtension gets automatically converted to Iosextension

Expected behavior

The human expected conversion would be IosExtension but since it is hard to determine automatically whether the E belongs to the group of upper-case letters or is the capitalization of the next word, the function should not apply any automatic correction and let any inspection using it emit a warning about the encountered string.

Environment information

• diktat version: 1.1.0
• build tool (gradle): 7.4.2
• how is diktat run (CLI, plugin, etc.): spotless
• kotlin version: 1.6.20
• operating system: windows/ubuntu

[orchestr7]

We can add workarounds for some pre-recorded words, like IOSExtension... But actually we already have Suppress mechanism. No chance to fix it otherwise.

[HaukeRa]

Wouldn't it be beneficial if diktat would warn about these and not try to fix them automatically? Of course that is just my expectation if a resolution is ambiguous, but thats debatable for sure.