[New Feature]: Introduce on Type formating language feature to LS

[malinthar]

Description

Format code when typing. The format request textDocument/onTypeFormatting is trigger by special characters like {, }, ;

Refer https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocument_onTypeFormatting

[IMS94]

+1

[lochana-chathura]

Sample use case,

function getJsonProperty(json|error data) returns json|error? => <cursor>

or

function getJsonProperty(json|error data) returns json|error? => <cursor> data is error ? data.message() : data.'worker;

When we press enter at the cursor position above,

• current behavior,

  function getJsonProperty(json|error data) returns json|error? => 
  data is error ? data.message() : data.'worker;

• expected behavior,

  function getJsonProperty(json|error data) returns json|error? => 
  data is error ? data.message() : data.'worker;

In coding styles, we encourage using expression-bodied functions over block-function-body whenever possible. Therefore, I expect this to be a quite frequent scenario.