Create 'process-all' helper module

[jakev]

in order to use dtf effectively, you'll need to run 10+ modules. A process-all wrapper module should contain all the commands needed to:

• pull apps, unpack, populate database, create DEX dbs
• pull frameworks, unpack, populate database, create DEX dbs
• generate system service database
• generate device database

Obviously there might be errors, so error checking is most important here.

[jakev]

Forgot to close this one: https://github.com/jakev/dtfmods-core/commit/75d6b39299dd92e2909986eb173e014020515d43