Epic comprehensive DnD release

[jalal246]

Branch tasks:

• FIx DnD files structure. Probably by adding more sub-packages.
• Working on dragged going out horizontally from the lists. Which is not reliable right now. Working on this means working on the dragged parent Add parent calculations to dragged #73
• Unifying assigning patterns. For assigning new parents or siblings Improve packages scalability in DnD #72
• Add integration test configuration Add initial Testing for DnD dragged #77
• Remove puppeteer and all config related and fully migrate to Cypress Add linting CI, remove unnecessary packages  #81
• Add rollback functionalities, so can elements have the ability to time travel Add element time traveler  #79, Fix undo approach in list updater #78
• Add new test cases:
  • Add integration test For Draggable. Testing flags in it is so crucial.
  • to switching elements horizontally
  • to switching elements vertically Add vertical testing for DnD draggable  #80, Add vertical tests for passing multi siblings #88, Add complex vertical test cases  #89
• Add CI
  • Add linting CI Add linting CI, remove unnecessary packages  #81
  • Integrate Cypress CI Add Cypress CI #82
• Add Cypress code coverage Refactor structure for more decentralize testing and developing  #83 Add code coverage to Cypress (2nd attempt)  #84 #85
• Add new:
  • Lifting elements up when dragged leaves the parent from top
  • Moving elmenet down when dragged enters the parent
  • Lifting elements up when dragged leaves the parent from the side
  • Moving elmenet down when dragged enters the side Create droppable index method #95

[codecov-commenter]

Codecov Report

Merging #74 into master will decrease coverage by 9.76%.
The diff coverage is 25.51%.

@@            Coverage Diff             @@
##           master      #74      +/-   ##
==========================================
- Coverage   70.93%   61.16%   -9.77%     
==========================================
  Files          16       17       +1     
  Lines         344      412      +68     
  Branches       45       64      +19     
==========================================
+ Hits          244      252       +8     
- Misses         87      131      +44     
- Partials       13       29      +16     

Impacted Files	Coverage Δ
packages/dnd/src/DnDStore/DnDStoreImp.js	100.00% <ø> (ø)
packages/dnd/src/Droppable/Droppable.js	0.00% <0.00%> (ø)
packages/coreInstance/src/CoreInstance.js	36.95% <3.84%> (-2.18%)	⬇️
packages/dnd/src/Draggable/Draggable.js	61.81% <42.85%> (ø)
packages/dnd/src/Draggable/Base.js	93.87% <100.00%> (ø)
packages/dnd/src/Draggable/test/utils.js	100.00% <100.00%> (ø)
packages/store/src/Store.js	100.00% <100.00%> (ø)
packages/store/src/Tracker.js	100.00% <100.00%> (ø)
scripts/dflex-utils-test/funcs.js	91.30% <100.00%> (ø)
scripts/dflex-utils-test/instances.js	100.00% <100.00%> (ø)
... and 4 more

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