Standardize formatting of shell code in tasks and workflows

[per1234]

Shell scripts in Arduino tooling projects are formatted according to the style implemented by the shfmt formatting tool.

In addition to standalone script files, significant quantities of complex shell code is also found in the asset tasks and workflows. shfmt can not be used to format this code (both due to the fact it is in the form of strings in YAML documents, and due to the fact that it is actually templates of shell code (making use of the templating features of Task and GitHub Actions) rather than complete shell code). However, it still makes sense to align the formatting of this code with the standardized shell code style where doing so is feasible.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.33%. Comparing base (fe2acf1) to head (ec3b935).
⚠️ Report is 8 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (fe2acf1) and HEAD (ec3b935). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (fe2acf1)	HEAD (ec3b935)
unit	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #926      +/-   ##
==========================================
- Coverage   89.91%   83.33%   -6.59%     
==========================================
  Files          44        1      -43     
  Lines        6813      180    -6633     
==========================================
- Hits         6126      150    -5976     
+ Misses        559       19     -540     
+ Partials      128       11     -117     

Flag	Coverage Δ
unit	83.33% <ø> (-6.59%)	⬇️

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