Place config files in a versioned directory

[chapulina]

Signed-off-by: Louise Poubel louise@openrobotics.org

🦟 Bug fix

Fixes #765

Summary

From Fortress, place the config files in a versioned directory inside ~/.ignition/gazebo. This will make sure that Fortress users don't reuse config files from older versions unless they explicitly ask to.

I targeted this at Fortress because I still haven't thought of a nice way to make this backwards compatible. The suggestion I put on the issue:

For example, Gazebo could always look for ~/.ignition/gazebo/gui.config first, and use that if it exists.

Wouldn't be a good idea for existing users who are migrating to Fortress, for example.

Checklist

• Signed all commits for DCO
• Added tests - existing tests should pass
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

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[jennuine]

Looks good, one minor comment

[codecov]

Codecov Report

Merging #1050 (6a3620c) into main (f4d47b5) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 6a3620c differs from pull request most recent head bd35ed1. Consider uploading reports for the commit bd35ed1 to get more accurate results

@@            Coverage Diff             @@
##             main    #1050      +/-   ##
==========================================
- Coverage   63.71%   63.70%   -0.01%     
==========================================
  Files         257      257              
  Lines       20064    20064              
==========================================
- Hits        12783    12782       -1     
- Misses       7281     7282       +1     

Impacted Files	Coverage Δ
src/ServerConfig.cc	90.33% <100.00%> (ø)
src/gui/Gui.cc	64.34% <100.00%> (ø)
src/EntityComponentManager.cc	84.95% <0.00%> (-0.15%)	⬇️

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