feat: symlink the local adapter instead of pack/install on each change

[AlCalzone]

This PR will make it possible to work on adapter with less delay. Instead of packing the repo each time and manually syncing files, we instead configure npm to symlink the repo into node_modules.

This requires some changes in js-controller (ioBroker/ioBroker.js-controller#2103), as well as a bit of fine-tuning because of sourcemaps/breakpoints.
Also we should make this opt in, at least until js-controller 5.

[AlCalzone]

I also figured out debugging now. We need to create the following launch configs in VSCode, depending on the adapter type (JS or TS):

		{
			"name": "Debug JS adapter",
			"address": "127.0.0.1",
			"localRoot": "${workspaceFolder}",
			"port": 9229,
			"remoteRoot": "${workspaceFolder}/.dev-server/default/node_modules/iobroker.devserver-test",
			"request": "attach",
			"skipFiles": [
				"<node_internals>/**"
			],
			"type": "node"
		},

		{
			"name": "Debug TS adapter",
			"port": 9229,
			"request": "attach",
			"skipFiles": [
				"<node_internals>/**"
			],
			"type": "node",
			"resolveSourceMapLocations": [
				"${workspaceFolder}/**",
				// only exclude node_modules from the workspace folder
				// If we exclude node_modules from .dev-server/..., we don't get sourcemaps
				"!${workspaceFolder}/node_modules/**"
			],
			"sourceMapPathOverrides": {
				"../src/*": "${workspaceFolder}/src/*"
			}
		}

dev-server should probably do that itself.

The JS launch config simply replaces the symlinked path with the actual path (although the program still runs on the symlinked path). The TS launch config uses source maps to change the debugger path.

[AlCalzone]

TODO:

• decide if we should create VSCode launch configs for the user, or just document it
• figure out why the proxy isn't working anymore, see below

[UncleSamSwiss]

Thanks a lot. There are a few things we could improve, but I'll leave it at that.

Once JS Controller 5 is used by most developers, we should consider creating the launch config for VS Code.