Iox 1942 introduce further semantic string types

[elfenpiff]

Pre-Review Checklist for the PR Author

1. Code follows the coding style of CONTRIBUTING.md
2. Tests follow the best practice for testing
3. Changelog updated in the unreleased section including API breaking changes
4. Branch follows the naming format (iox-123-this-is-a-branch)
5. Commits messages are according to this guideline
   • Commit messages have the issue ID (iox-#123 commit text)
   • Commit author matches Eclipse Contributor Agreement (and ECA is signed)
6. Update the PR title
   • Follow the same conventions as for commit messages
   • Link to the relevant issue
7. Relevant issues are linked
8. Add sensible notes for the reviewer
9. All checks have passed (except task-list-completed)
10. All touched (C/C++) source code files from iceoryx_hoofs are added to ./clang-tidy-diff-scans.txt
11. Assign PR to reviewer

Notes for Reviewer

Checklist for the PR Reviewer

• Commits are properly organized and messages are according to the guideline
• Code according to our coding style and naming conventions
• Unit tests have been written for new behavior
• Public API changes are documented via doxygen
• Copyright owner are updated in the changed files
• All touched (C/C++) source code files from iceoryx_hoofs have been added to ./clang-tidy-diff-scans.txt
• PR title describes the changes

Post-review Checklist for the PR Author

1. All open points are addressed and tracked via issues

References

• Closes Strong string types #1942

[codecov]

Codecov Report

Merging #1951 (4a00712) into master (207d419) will increase coverage by 0.02%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master    #1951      +/-   ##
==========================================
+ Coverage   75.51%   75.53%   +0.02%     
==========================================
  Files         388      392       +4     
  Lines       15276    15330      +54     
  Branches     2158     2181      +23     
==========================================
+ Hits        11536    11580      +44     
+ Misses       3067     3066       -1     
- Partials      673      684      +11     

Flag	Coverage Δ
unittests	75.19% <80.00%> (+0.02%)	⬆️
unittests_timing	15.32% <0.00%> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
iceoryx_hoofs/vocabulary/include/iox/string.hpp	100.00% <ø> (ø)
...ceoryx_hoofs/posix/vocabulary/source/user_name.cpp	85.71% <66.66%> (ø)
...ceoryx_hoofs/posix/vocabulary/source/file_name.cpp	71.42% <71.42%> (ø)
...ceoryx_hoofs/posix/vocabulary/source/file_path.cpp	80.00% <80.00%> (ø)
...eoryx_hoofs/posix/vocabulary/source/group_name.cpp	85.71% <85.71%> (ø)
iceoryx_hoofs/posix/vocabulary/source/path.cpp	100.00% <100.00%> (ø)
...ryx_hoofs/vocabulary/include/iox/detail/string.inl	98.42% <100.00%> (-0.38%)	⬇️

... and 2 files with indirect coverage changes

[elBoberido]

This puts a smile on Walter E. Brown's face :)