Add support for recognizing word locales in word operations (#50045)

[yutotnh]

Corresponds to #50045 in Feature request.

This feature allows you to use Ctrl+Left or Ctrl+Right to navigate in languages that are not separated by spaces, such as Japanese or Chinese, with word separators.

If the user does not enter any settings, the system will continue to operate as before, so English speakers and others who do not need this feature will not be affected.

Since I am Japanese and often write Markdown and other Japanese text in VS Code, this feature was needed and desired by many people around me.

Example now: (use | as the cursor)

or if the setting is "editor.recognizeWordLocales": "" (default).

|これはサンプルの文字列です。
// Ctrl+Right
これはサンプルの文字です。|

|日本語とEnglishです。
// Ctrl+Right
日本語とEnglishです。|

Example of functionality enabled

The setting is "editor.recognizeWordLocales": "ja".

|これはサンプルの文字です。
// Ctrl+Right
これ|はサンプルの文字です。
// Ctrl+Right
これは|サンプルの文字です。
// Ctrl+Right
これはサンプル|の文字です。
// Ctrl+Right
これはサンプルの|文字です。
// Ctrl+Right
これはサンプルの|文字です。
// Ctrl+Right
これはサンプルの文字|です。
// Ctrl+Right
これはサンプルの文字です。|

|日本語とEnglishです。
// Ctrl+Right
日本語|とEnglishです。
// Ctrl+Right
日本語と|Englishです。
// Ctrl+Right
日本語とEnglish|です。
// Ctrl+Right
日本語とEnglishです。|

[fireattack]

In addition to word boundary inside Japanese/Chinese sentences, I think boundary between Japanese/Chinese character and Latin character should be considered as word boundary by default.

Like: 我喜欢在中文中夹杂English单词。 -- there should be a stop between 杂 and E, and between h and 单, when you navigate around, This is also the default behavior of almost every single text editor or any text input, even notepad.exe. VS Code is the only software I ever used that does not have this.

[rebornix]

@alexdima this is a very interesting improvement, assigning to you since you added the grapheme clusters support. let me know if you need anything from my side.

[alexdima]

Thank you!