Move scripts API to uavos/apx-fw

[uavinda]

The whole scripts dev environment should be moved from GCS resources to uavos/apx-fw repo as module and generate apxfw with resources, latter copied and extracted by GCS as other firmware metadata.

The goal is to each node to have separate script dev environment embedded in apxfw file as other metadata. When GCS user edits a script - GCS copies dev env from corresponding apxfw. Thus, allowing each node to have its own API with fallbacks to older versions and other nodes (f.ex. nav).