## Description 

This PR adds support for inline type hints. Currently supporting local
variable definitions and lambda parameters (see type hints in grey):


![image](https://github.com/MystenLabs/sui/assets/1724397/1b35ed62-42da-4b1b-acd7-d6fcd1b6e323)

Needed to upgrade both client-side and server-side lsp-related libraries
which are the cause of some changes in this PR beyond the core logic of
implementing type hints (tried to mark those in the comments)


## Test plan 

Verified by hand that the type hints are displayed correctly