Replace old-style TS modules with namespaces

[jakebailey]

See microsoft/TypeScript#62876

module has been frowned on for a very long time, was soft deprecated a few releases ago, hard errors in 6.0, and won't even parse in 7.0.

[Copilot]

Pull request overview

This PR modernizes the codebase by replacing deprecated TypeScript module declarations with the modern namespace keyword. This change is necessary for compatibility with TypeScript 6.0+ which hard errors on the old module syntax, and TypeScript 7.0 which won't parse it at all.

• Replaces all instances of export module with export namespace
• Replaces all instances of declare module with declare namespace
• Maintains identical functionality with updated syntax

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/vs/workbench/contrib/tasks/common/problemMatcher.ts	Updates three exported namespace declarations (FileLocationKind, ProblemLocationKind, ApplyToKind)
src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts	Updates globalThis ambient declaration
src/vs/workbench/contrib/debug/common/debugProtocol.d.ts	Updates DebugProtocol ambient declaration in auto-generated file
src/vs/server/node/remoteExtensionHostAgentServer.ts	Updates vsda native module ambient declaration
src/vs/platform/sign/node/signService.ts	Updates vsda native module ambient declaration
src/vs/platform/sign/browser/signService.ts	Updates vsdaWeb module ambient declaration
src/vs/platform/extensionManagement/node/extensionSignatureVerificationService.ts	Updates vsceSign module ambient declaration
src/vs/editor/standalone/browser/standaloneServices.ts	Updates StandaloneServices exported namespace

All changes are straightforward syntactic replacements with no functional impact. The changes are correct and necessary for TypeScript compatibility.

[jakebailey]

cc @mjbvz

[mjbvz]

Thanks!