feat(formulas): create new Formula Editor plugin

[ghiscoding]

Similar implement to Ag-Grid Formulas which is basically to be able use Excel spreadsheet formulas in any grids. This will be an opt-in plugin (external resource) and after installation the user will simply need to add allowFormula to whichever column definition

TODOs

• working POC
• export to Excel with formulas
• full unit tests coverage
• Cypress E2E tests
• better showing of formula cell selected and cell range selected
• support Custom Functions
  • note: implemented already but on the export side, it is only supported by latest Office 365 via (Lambda functions)
• function intellisense isn't working in the middle of the formula
  • formula cell selection are being inversed when adding a sum in the middle of the formula
    • when fixed, we need Cypress tests to avoid future regression
  • bug is back after closing/reopening the cell, the color are inversed again
• dark theme has multiple unused SASS variables that we might need
• improve formula editor styling to make it 100% width like other editors
• What should we do when offset introduced?
  • not currently working with Grouping
  • issues with Column Reorder and/or Hiding a column
  • what happened when a referenced column is hidden? Also, how will this impact Excel like column numbering?
  • it could work with REF(COLUMN("price"),ROW("1")) but that is a lot to type instead of C1, perhaps we could do mapping behind the scene and update the mapping when offset is introduced (e.g. column reorder, grouping)?
  • and actually Ag-Grid stores all formulas with ref/row as per their docs:

Stored formulas:
Key: a_01-total, Formula: =REF(COLUMN("price"),ROW("a_01"))*REF(COLUMN("quantity"),ROW("a_01"))
Key: o_02-total, Formula: =REF(COLUMN("price"),ROW("o_02"))*REF(COLUMN("quantity"),ROW("o_02"))

• does a formula ref (e.g. REF(COLUMN("price"),ROW("1"))) actually works with Excel export?
• can we have more highlighted styling for the selected cell(s) that we choose from the formula editor (perhaps double bg opacity), we currently only see the caret on bottom right corner
• what about Grid State/Preset?
• current range selection in Hybrid Selection model only works if we expand the drag further down, but it doesn't work correctly when decreasing the range or going up (need fixes in the hybrid selection model)
  • fixed by PR fix(selection): allow drag handle to shrink cell selection #2729
• dragging a formula cell replicates formulas to target cells using the drag-fill handle, including relative/absolute references, stable formula storage, Excel export, and common numeric series inference
• wonder if we should also include the calculated columns which is Excel formulas but at the column level (e.g. calculatedExpression: '[revenue] - [cost]' where [revenue] is the column id in square bracket)
• while making a cell range, in Excel we can click on the drag handle (square at bottom corner) to select the entire column range (stops when reaching empty cell)... not supported by Ag-Grid
• formula editor and formula service have duplicated logic to handle cell color highlights
• should we use autocompleter instead of creating a new autocomplete from scratch?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.0%. Comparing base (b3bfe2d) to head (1c2abc4).
✅ All tests successful. No failed tests found.

Additional details and impacted files

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  Branches     9146     9641    +495     
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+ Hits        25873    27897   +2024     

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commit: 1c2abc4