Update documentation for latest versions

[twsouthwick]

I'm the main maintainer on the OpenXML SDK and would like to get the docs updated to reflect the current state of things. This issue will be a (potentially growing) list of the items that we would like to update:

• The documentation refers to specific versions - this is unnecessary as the version is not static nor is the content dependent on it (Remove explicit version reference to 2.5 #158)
• APIs have not been updated since 2.8.1 - should add APIs for at least v2.2.0 and v3.0.0 (it'll be released next month) ( Update APIs for v3.0 when released #156)
• New samples are available at https://github.com/dotnet/Open-XML-SDK/tree/main/samples and should be migrated here
  • AnimatedModel3DExample
  • DocumentTaskExample
  • IsolatedStorageExceptionWorkaround
  • Linq
  • NamedSheetView
  • PowerPointModernCommentSample
  • RichData
  • SunburstChartExample
  • SVGExample
  • ThreadedCommentExample
• Samples use VB and CS but are all inline and should be moved to actual test projects, be runnable, and shown in docfx tabs Add samples projects to a solution #163
• Updated/new topics:
  • IFeatureCollection usage Add features collection to docs #179
  • LINQ support
  • Migration to v3 Add migration guide to v3.0 #178
• Update getting started related steps (no longer need to "install" SDK - update to account for NuGet packages and dotnet CLI) Update getting started doc to show the NuGet packages #171
• Reorganize doc file structure so that they match the toc Reorganize files to follow table of contents #169
• references to ISO/IEC 29500:2008 should be updated to 2016, including one reference to ISO/IEC2900:2008 (missing "5")
• there are references and procedures for Visual Studio 2008
• remove references to the SDK 1.0
• completely revamp the What's New in the Open XML SDK topic Update the What's New page to reflect the latest changelog info #172
• Documentation section in SDK Readme still mentions SDK 2.5
• Fix broken samples
  • Sample code for inserting charts into spreadsheet is not working #146
  • Get cell value bug #144
  • Sample Code no longer works for editing Word Document File. #91
  • Example code produce invalid format #56
  • Code of docs about create pptx result without any content #53
  • URI for inserting a new image in Word document refers to https instead of http #51
  • cant find Deleted Inserted #153

[twsouthwick]

@davidchesnut Previously you enabled 2.8.1 packages to have their APIs show up in the docs. How can we get later versions added? we tend to release every quarter or so, and would like to get a process to get updates pushed out in the docs

[twsouthwick]

@AlfredHellstern feel free to modify the original issue to have one list of things to track. Appreciate your keen eye here for wording :)

[AlfredHellstern]

@twsouthwick done

[twsouthwick]

@mikeebowen can you update the check list here for the work you have done?

[mikeebowen]

@twsouthwick I don't have permission

[twsouthwick]

can you update your comment then with any updates and I'll update the main list?