Inline windows explorer sparse package DLL build

[joaomoreno]

• https://github.com/microsoft/vscode/blob/4d917a1ab503ea29c857e6ab05e3c931e1604c70/build/win32/explorer-dll-fetcher.ts
• https://github.com/microsoft/vscode-explorer-command

cc @deepak1556

[vs-code-engineering]

Hi @joaomoreno. As a member of the team, you can help us triage this issue by referring to https://github.com/microsoft/vscode-copilot/wiki/Copilot-Inbox-Tracker and assigning an owner directly.