Update name and logo on UI, examples and API docs

[chapulina]

• Part of ign to gz: UI, API docs gazebo-tooling/release-tools#728

Summary

• Logo
• Window title
• Example docs
• API docs
• Version header
• CLI message

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• 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

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸🔸

[codecov]

Codecov Report

Merging #398 (8ac8b41) into main (01a0753) will not change coverage.
The diff coverage is n/a.

❗ Current head 8ac8b41 differs from pull request most recent head 96db6c5. Consider uploading reports for the commit 96db6c5 to get more accurate results

@@           Coverage Diff           @@
##             main     #398   +/-   ##
=======================================
  Coverage   30.03%   30.03%           
=======================================
  Files          43       43           
  Lines        1888     1888           
=======================================
  Hits          567      567           
  Misses       1321     1321           

Impacted Files	Coverage Δ
include/gz/gui/qrc_resources.cpp	100.00% <0.00%> (ø)

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[jennuine]

LGTM, found a couple more docs in case you want to change in this PR:

• gz-gui/include/gz/gui/Conversions.hh

  Line 99 in 8ac8b41

  /// \brief Return the equivalent ignition key event.

• gz-gui/include/gz/gui/Helpers.hh

  Lines 94 to 96 in 8ac8b41

  	/// ignition QML modules can be imported from. To import an ignition QML
  	/// module, add this path to the QML engine's import path list before
  	/// attempting to load a QML file that imports ignition QML modules.

• gz-gui/src/plugins/minimal_scene/MinimalScene.hh

  Line 42 in 8ac8b41

  /// \brief Creates an ignition rendering scene and user camera.

• I believe we're deprecating this but I've included it here in case:

  gz-gui/src/plugins/scene3d/Scene3D.hh

  Line 45 in 8ac8b41

  /// \brief Creates an ignition rendering scene and user camera.

[chapulina]

found a couple more docs in case you want to change in this PR:

Thanks! Updated in 96db6c5