Enable Windows Conpty Dll as default

[Anthony Kim (anthonykim1)]

Resolves: #224488

/cc Megan Rogge (@meganrogge) Daniel Imms (@Tyriar)

[Copilot]

Pull request overview

This PR flips the default for the Windows terminal setting terminal.integrated.windowsUseConptyDll so VS Code uses the bundled conpty.dll by default, aligning with the goal of shipping a newer ConPTY implementation rather than relying on the OS-provided one.

Changes:

• Set terminal.integrated.windowsUseConptyDll default to true.
• Remove “preview/experimental” labeling from the setting description/metadata.

Show a summary per file

File	Description
src/vs/workbench/contrib/terminal/common/terminalConfiguration.ts	Makes the shipped conpty.dll the default backend option by updating the setting schema (description + default).

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 1

[Daniel Imms (Tyriar)]

How did the rollout for this look? Has it been in stable for some time?

[Anthony Kim (anthonykim1)]

Daniel Imms (@Tyriar) Thankfully not much surprised as initially thought! This has been sitting on stable for 100% for at least 3 weeks~

Only thing that was odd was #311821 , long standing psreadline issue where it would request "black" when they mean "no background"
tl;dr is to just update psreadline or just use powershell that is not decade old..