[MISC] Add quotes to strings

[eseiler]

See #222

To-do

• Adapt CTD/CWL
• Add API patches

Test output on terminal

POSITIONAL ARGUMENTS
    ARGUMENT-1 (List of std::string)
          Default: ["Some", "other", "string"]

OPTIONS
    -a, --string1 (std::string)
          Default: ""
    -b, --string2 (std::string)
          Default: "Some string"
    -c, --string3 (std::string)
          Default: "Quoted"
    -d, --string4 (List of std::string)
          Default: ["Some", "other", "string"]
    -e, --string5 (List of std::string)
          Default: None

POSITIONAL ARGUMENTS
    ARGUMENT-1 (List of std::filesystem::path)
          Default: ["/some", "/other", "/path"]

OPTIONS
    -a, --path1 (std::filesystem::path)
          Default: ""
    -b, --path2 (std::filesystem::path)
          Default: "/some/path"
    -c, --path3 (std::filesystem::path)
          Default: "/usr/bin/"
    -d, --path4 (List of std::filesystem::path)
          Default: ["/some", "/other", "/path"]
    -e, --path5 (List of std::filesystem::path)
          Default: None

Questions

• Do we also want to get rid of the . at the end? (If there is a validator message, it will take care of prepending . )
• std::quoted also escapes quote inside strings. Do we want that?
• Should we also quote filepaths?

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Name	Status	Preview	Updated (UTC)
sharg-parser	✅ Ready (Inspect)	Visit Preview	Feb 5, 2024 6:13pm

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (fb9552d) 91.91% compared to head (f1a2163) 91.90%.

❗ Current head f1a2163 differs from pull request most recent head 19a3e9b. Consider uploading reports for the commit 19a3e9b to get more accurate results

Files	Patch %	Lines
include/sharg/detail/format_tdl.hpp	85.71%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #224      +/-   ##
==========================================
- Coverage   91.91%   91.90%   -0.01%     
==========================================
  Files          17       17              
  Lines        1595     1618      +23     
==========================================
+ Hits         1466     1487      +21     
- Misses        129      131       +2     

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[SGSSGene]

My answers to all three questions:

• yes
• yes
• yes

[h-2]

As far as I am concerned, you can get rid of the dot! But I would still wrap strings (and paths!) in quotes, because the user needs to be able to distinguish " " and "" (or "foo " and "foo").
If you are concerned that this will cause ambiguity with literal quotes, you could choose more exotic quotes, like the ones used for code in markdown (`) or the french ones: »foo«

[SGSSGene]

Thank you!

[h-2]

Thanks ❤️