Config specification v2

[NeoTheThird]

This implements a testing ground for v2 of the config file specification. We'll do a near re-write of devices.js to improve stability, maintainability, and extensibility. Additional features enabled by the new specification will be implemented where it makes sense.

This PR will remain a draft while the work is in progress. Implemented changes are listed below. This list will be updated accordingly.

• Allows the installer to read YAML v2 config files and consume a makeshift api
• Implements advanced conditional logic, resolves Support of multiple conditions #1536.
• Create a testable core module to unblock Road to 100% coverage #1572.
• v2 supports configurable unlocking, resolves Make unlocking more flexible #1479
• Fallback now uses actions, resolves Implement fallback as a step #941
• Implement group step, resolves Implement group step #940
• Groundwork for plugins to unblock Make systemimage use steps #1387, Create an AsteroidOS downloader #1395 and Create a LineageOS downloader #1557
• Allow operating systems to specify EULAs
• auto-detect user-action reboot with wait function, resolves auto-detect user-action reboot with wait function #1511
• Deprecate the ubports-api-node-module
• Adopt a verbose logging level that is less extreme than debug
• get rid of all globals except packageInfo

[codecov-io]

Codecov Report

Merging #1576 (8aa8fe3) into master (71f0ea4) will increase coverage by 18.24%.
The diff coverage is 51.67%.

@@             Coverage Diff             @@
##           master    #1576       +/-   ##
===========================================
+ Coverage   39.54%   57.79%   +18.24%     
===========================================
  Files          17       24        +7     
  Lines         665      770      +105     
===========================================
+ Hits          263      445      +182     
+ Misses        402      325       -77     

Impacted Files	Coverage Δ
src/core/plugins/adb/plugin.js	10.25% <10.25%> (ø)
src/main.js	43.90% <16.66%> (+6.97%)	⬆️
src/core/plugins/systemimage/client.js	17.14% <18.18%> (ø)
src/lib/errors.js	40.00% <20.00%> (-7.37%)	⬇️
src/core/plugins/fastboot/plugin.js	23.61% <23.61%> (ø)
src/core/plugins/heimdall/plugin.js	25.00% <25.00%> (ø)
src/lib/mainEvent.js	32.18% <35.00%> (+4.46%)	⬆️
src/core/deviceTools.js	58.82% <37.50%> (ø)
src/core/plugins/systemimage/plugin.js	38.46% <38.46%> (ø)
src/core/core.js	51.18% <51.18%> (ø)
... and 15 more

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[NeoTheThird]

Not quite there yet, but we're also making steady progress towards high cohesion and low coupling. There's more we need to do, but this already takes us a long way towards better maintainability and extensibility.