Allow repeated application of rules in map module

[thomaskrause]

Also fix some issues in the xlsx importer/exporter that are necessary to convert the RIDGES corpus properly.

[codecov]

Codecov Report

Attention: Patch coverage is 89.81132% with 27 lines in your changes missing coverage. Please review.

Project coverage is 83.14%. Comparing base (e81e546) to head (0868093).
Report is 9 commits behind head on main.

Files with missing lines	Patch %	Lines
src/manipulator/map.rs	86.27%	2 Missing and 19 partials ⚠️
src/exporter/xlsx.rs	94.50%	2 Missing and 3 partials ⚠️
src/importer/xlsx.rs	95.23%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #309      +/-   ##
==========================================
+ Coverage   82.99%   83.14%   +0.14%     
==========================================
  Files          52       52              
  Lines       19141    19351     +210     
  Branches    19141    19351     +210     
==========================================
+ Hits        15886    16089     +203     
+ Misses       1185     1183       -2     
- Partials     2070     2079       +9     

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