[ign-fuel-tools1] Workflow updates

[chapulina]

• Add labeler workflow
• Add triage workflow
• Add Ubuntu CI workflow with Codecov upload
• Update badges
• Add CODEOWNERS
• This needs Script hooks gazebo-tooling/action-gz-ci#4 for the examples compilation to work.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (ign-fuel-tools1@6fd93c0). Click here to learn what that means.
The diff coverage is n/a.

@@                Coverage Diff                 @@
##             ign-fuel-tools1      #62   +/-   ##
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  Coverage                   ?   56.88%           
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  Files                      ?       36           
  Lines                      ?     5258           
  Branches                   ?        0           
==================================================
  Hits                       ?     2991           
  Misses                     ?     2267           
  Partials                   ?        0           

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[maryaB-osr]

👍