Fix integers and floats on component inspector

[chapulina]

🦟 Bug fix

Addresses part of #158

Summary

The Integer and Float QML files were not being compiled. This fixes that by adding them to the qrc file. It also fixes the looks of those types, adds unit support, and exercises them with a few components.

Checklist

• Signed all commits for DCO
• Added tests
• 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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[codecov]

Codecov Report

Merging #1143 (52362a7) into ign-gazebo3 (a42cac4) will decrease coverage by 0.24%.
The diff coverage is 0.00%.

@@               Coverage Diff               @@
##           ign-gazebo3    #1143      +/-   ##
===============================================
- Coverage        77.70%   77.45%   -0.25%     
===============================================
  Files              222      222              
  Lines            12716    12757      +41     
===============================================
  Hits              9881     9881              
- Misses            2835     2876      +41     

Impacted Files	Coverage Δ
.../plugins/component_inspector/ComponentInspector.cc	6.50% <0.00%> (-0.75%)	⬇️

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