Typings Intaller initial work

[sheetalkamat]

This ports the typescript installer code from Strada

Instead of different process we use go routine to queue discovery of the packages install and then another go routine to do actual install.

Here are things that are still not ported and are todo for later

• Js file names to search typings for - need to exclude source files from external module search - currently this data is not threaded so left it for later
• custom npm path, safelist path etc that earlier we use to take - review and add the options that we really need
• Strada use to use events to notify client about typings installation. we need to use notification but will do that later
• TypingsInstaller currently uses "latest" as version to install typings for, to change this to correct version when we have typings for those published

While working on this, found out current bug in strada where typings already installed are not cached correctly if lockfile version is newer. This i havent fixed but will do that separately later. This means even if say @types/chai is already in our cache location installed, we will reinstall it. (Because package-lock.json structure change)

[Copilot]

Pull Request Overview

This PR ports the TypeScript installer logic from Strada into a more concurrent design by replacing separate processes with goroutines and extending type acquisition support.

• Introduces changes to how typings are discovered, cached, and installed.
• Updates module resolution and project setup to incorporate typings location and type acquisition.
• Adds new helper methods and fields in several modules (e.g. tsoptions, project, parsedcommandline, resolver) to support the new installer design.

Reviewed Changes

Copilot reviewed 26 out of 26 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
internal/tsoptions/tsconfigparsing.go	Replaces legacy functions with vfs methods for generating regexes.
internal/testutil/projecttestutil/projecttestutil.go	Updates test installer setup and adds NpmInstall behavior using panics for unexpected cases.
internal/project/watch.go	Adjusts watched file management by introducing watchType and switching to host.Client() calls.
internal/project/*	Extends type acquisition and typings-handling across project construction, resolution, and update.
internal/lsp/server.go	Adds typingsLocation to server options and logs its usage.
internal/core/nodemodules.go, internal/module/resolver.go	Propagates typings-related fields down to the resolver and module resolution logic.
cmd/tsgo/lsp.go	Implements cross-platform logic to derive a global typings cache location.

Comments suppressed due to low confidence (2)

internal/project/discovertypings.go:294

• Ensure thorough unit tests cover edge cases for removeMinAndVersionNumbers to validate that its behavior matches the legacy regex approach.

func removeMinAndVersionNumbers(fileName string) string {

internal/api/api.go:75

• [nitpick] If the nil return is intentional as a stub, add an inline comment explaining that the TypingsInstaller is not yet implemented.

func (api *API) TypingsInstaller() *project.TypingsInstaller { return nil }

[sheetalkamat]

looking into test failures

[jakebailey]

Works on my machine 😄