Docs: Explain getSheetDimensions() issue with empty rows and columns

[sequba]

Context

Improve API reference of:

• getSheetDimensions,
• setColumnOrder
• setRowOrder

Inspired by the discussion in issue #1471

How did you test your changes?

local docs build

Types of changes

• Breaking change (a fix or a feature because of which an existing functionality doesn't work as expected anymore)
• New feature or improvement (a non-breaking change that adds functionality)
• Bug fix (a non-breaking change that fixes an issue)
• Additional language file, or a change to an existing language file (translations)
• Change to the documentation

Checklist:

• I have reviewed the guidelines about Contributing to HyperFormula and I confirm that my code follows the code style of this project.
• I have signed the Contributor License Agreement.
• My change is compliant with the OpenDocument standard.
• My change is compatible with Microsoft Excel.
• My change is compatible with Google Sheets.
• I described my changes in the CHANGELOG.md file.
• My changes require a documentation update.
• My changes require a migration guide.

[github-actions]

Performance comparison of head (4a1ced5) vs base (245799c)

                                     testName |   base |   head | change
------------------------------------------------------------------------
                                      Sheet A | 522.17 | 524.91 | +0.52%
                                      Sheet B | 175.17 | 173.58 | -0.91%
                                      Sheet T | 151.91 | 152.13 | +0.14%
                                Column ranges | 523.34 | 530.88 | +1.44%
Sheet A:  change value, add/remove row/column |  16.42 |  15.39 | -6.27%
 Sheet B: change value, add/remove row/column | 149.99 | 139.68 | -6.87%
                   Column ranges - add column | 167.87 | 162.81 | -3.01%
                Column ranges - without batch | 488.55 | 473.17 | -3.15%
                        Column ranges - batch | 121.76 | 121.78 | +0.02%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.20%. Comparing base (245799c) to head (4a1ced5).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1476   +/-   ##
========================================
  Coverage    97.20%   97.20%           
========================================
  Files          169      169           
  Lines        14430    14430           
  Branches      3027     3027           
========================================
  Hits         14027    14027           
  Misses         403      403           

Files with missing lines	Coverage Δ
src/HyperFormula.ts	99.73% <ø> (ø)