Enhance the IPluginInfo to contain also the description

[karlitos]

I would really appreciate, if the IPluginInfo could also include the the descritpion of the installed package. My application make a a very good use of live-plugin-manager in a way which offers users the possibility to install additional packages from NPM or local filesystem. The installable packages are shown in a list showing their name and the description.

Having the IPluginInfos location property I can parse the package.json, but this is basically the same thing live-plugin-manager is doing when creating the IPluginInfo.

So far I investigated the code a little bit an it seems, that only a small addition would be necessary to the createPluginInfo method in the PluginManager.ts file

private async createPluginInfo(name: string): Promise<IPluginInfo> {
		const location = this.getPluginLocation(name);
		const packageJson = await this.readPackageJsonFromPath(location);

		const mainFile = path.normalize(path.join(location, packageJson.main || DefaultMainFile));

		return {
			name: packageJson.name,
			description: packageJson.description,
			version: packageJson.version,
			location,
			mainFile,
			dependencies: packageJson.dependencies || {}
		};
	}

[davideicardi]

I confirm that it should be easy. If you are able to create a PR I will be happy to merge it.