Treat acronyms/initialisms as words in naming conventions

[sharwell]

Currently, sequences of capital letters are treated as single-letter words during naming convention analysis. For camelCase and PascalCase naming, only the first and last letters of a sequence of capital letters should be treated as the start of a word. The last should only be treated as the start of a word if it is followed by a lowercase letter.

See #26556

Examples:

Name	Words	To camelCase	To PascalCase
DTE	DTE	dte	DTE
UIShellService	UI, Shell, Service	uiShellService	UiShellService
anyCPUPlatformName	any, CPU, Platform, Name	anyCpuPlatformName	AnyCpuPlatformName
DTEEvents	DTE, Events	dteEvents	DteEvents
SERIALIZATION_DESCRIPTION	SERIALIZATION, DESCRIPTION	serializationDescription	SerializationDescription

[sharwell]

🔗 Related to #22745

[CyrusNajmabadi]

UiShellService

Is that correct? I thought with pascal casing the idea was to capitalize hte first letter of each word. Since "UI" is basically two works ("User" and "Interface") it was expected to be UIShellService. I honestly don't know and even looking in my own codebases i can see inconsistency here.

It's also a little odd that when the entire thing is an acronym (i.e. DTE) that hte pascal version it to keep it that way.

Note: this is very minor. It's just tht i realized i have no idea what the right thing is to do here, and we might have some conflicts here with how others see things.

[Joe4evr]

A special case is made for two-letter acronyms in which both letters are capitalized, as shown in the following identifier:

IOStream

So says Capitalization Conventions.

[CyrusNajmabadi]

Following that doc would be nice if possible. Thanks @Joe4evr !