Publish extension API to NPM

[jreineckearm]

Type: Feature Request

Publish extension API as package to NPM. This makes it easier to use the extension API without the danger of polluting a consumer's code base by copying type files.

[jreineckearm]

Just realized by reading https://github.com/eclipse-cdt-cloud/vscode-peripheral-inspector/blob/main/docs/extending-peripheral-inspector.md properly that one can import the repo itself. Trying that approach first before managing another release publish. Only concern is npm install speed.

[jreineckearm]

Experiencing serious CI performance issues pulling the whole repo. Still relevant.
@omarArm , can you please have a look at preparing this.
An example of how this was done before is here: https://github.com/eclipse-cdt-cloud/vscode-serial-monitor/tree/main/api