[Feature Request] Autocomplete candidate should sort by match, then alphabetically

Autocomplete should be sorted by most important matches first, then only by alphabetically.

For example, I have 2 variables, named `clientId` and `adminClientId`. When I type `client` and Ctrl + Space, `clientId` should be the first.


Start by locating the autocomplete candidate generation and sorting entry point in the TypeScript client. Reproduce the example with `clientId` and `adminClientId`, then verify that candidates prioritize match quality before alphabetical order; the issue does not name a specific file or test.

Written by the indexing model from the issue text.