Build tsgo with debug tasks when launching extension locally

[jakebailey]

Speeds up local dev and allows attaching when using this flow.

[Copilot]

Pull Request Overview

This PR adds a new debug build task to speed up local development when launching the extension. The changes include:

• Introducing a new npm script "build:watch:debug" in package.json that appends a debug flag to the build process.
• Updating the VS Code tasks to use the new "build:watch:debug" script for improved debugging during local extension launches.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
package.json	Added a new script "build:watch:debug" to enable debugging during local builds.
.vscode/tasks.json	Updated the npm task to reference the new debug build script.

Comments suppressed due to low confidence (2)

package.json:25

• Confirm that the underlying build command supports the '--debug' flag to avoid unexpected failures during the debug process.

"build:watch:debug": "hereby build:watch --debug",

.vscode/tasks.json:20

• Ensure that switching to the debug script in the VS Code task configuration aligns with all extension launch requirements and documentation.

"script": "build:watch:debug",