Add codefix and completions for promoting existing type-only imports to non-type-only

[andrewbranch]

Fixes #44804

We may want a corresponding VS Code update, because there is currently no indication in the completion details display that this completion has an associated action, even though we send a localized description with the code actions. I only just noticed that VS Code never uses that description; instead, the “Auto-import from ...” text seems to be hard-coded in the extension.

Was trying to get a screen recording, but my recorder software is crashing.

[andrewbranch]

@typescript-bot pack this

[typescript-bot]

Heya @andrewbranch, I've started to run the tarball bundle task on this PR at 280ad8e. You can monitor the build here.

[andrewbranch]

@typescript-bot pack this

[typescript-bot]

Heya @andrewbranch, I've started to run the tarball bundle task on this PR at 8dee845. You can monitor the build here.

[typescript-bot]

Hey @andrewbranch, I've packed this into an installable tgz. You can install it for testing by referencing it in your package.json like so:

{
    "devDependencies": {
        "typescript": "https://typescript.visualstudio.com/cf7ac146-d525-443c-b23c-0d58337efebc/_apis/build/builds/118112/artifacts?artifactName=tgz&fileId=2F94EF63693E9F06E11FA28AF9740F9151E995C6E631B1AFDC2A15F03C8DE06602&fileName=/typescript-4.6.0-insiders.20220122.tgz"
    }
}

and then running npm install.

---

There is also a playground for this build and an npm module you can use via "typescript": "npm:@typescript-deploys/pr-build@4.6.0-pr-47552-4".;

[sandersn]

Looks good, just some minor questions.

[lgarron]

I had a chance to test this out for #47631 and it's 😻😻😻😻😻😻 for our project!

Thanks so much, @andrewbranch and @typescript-bot!