Improve spell checker using codespell

* Configures automated spell checking with codespell
Adds GitHub workflows and configuration files for automated spell checking using `codespell`.

This includes:
- A workflow for checking pull requests and preventing new typos
- A workflow for automatically fixing typos in the main codebase
- Configuration files for `codespell` to ignore specific terms and file types
- Documentation on how to use and configure the spell checking workflows.

* Corrects minor spelling and grammar errors.

ApplicationLibCode/ProjectDataModel/WellLog/RimWellLogTrack.cpp

@@ -1043,7 +1043,7 @@ QString RimWellLogTrack::asciiDataForPlotExport() const
         {
             if ( dIdx == 0 )
                 continue; // Skip the first line. (shallow depth, which is last)
-                          // as it is a fictious value added to make
+                          // as it is a fictitious value added to make
                           // the plot easier to read
 
             i = curveDepths.size() - 1 - dIdx; // Reverse the order, since the connections are coming bottom to top