Resolve cppcheck errors by adding explicit constructors and consts

[jwnimmer-tri]

🦟 Bug fix

Fixes cppcheck complaints.

Summary

At least for me on the head of the main branch, I see these errors:

jwnimmer@call-cps:~/jwnimmer-tri/build-ign-math/ign-math$ make codecheck

ign-math/include/ignition/math/Plane.hh:66:15: style: Class 'Plane' has a constructor with 1 argument that is not explicit. [noExplicitConstructor]
      public: Plane(const Vector3<T> &_normal, T _offset = 0.0)
              ^
ign-math/include/ignition/math/OrientedBox.hh:142:35: style: Parameter '_pose' can be declared with const [constParameter]
      public: void Pose(Pose3<T> &_pose)
                                  ^
ign-math/include/ignition/math/SemanticVersion.hh:66:15: style: Class 'SemanticVersion' has a constructor with 1 argument that is not explicit. [noExplicitConstructor]
      public: SemanticVersion(const unsigned int _major,
              ^
ign-math/include/ignition/math/graph/Edge.hh:50:5: style: Struct 'EdgeInitializer' has a constructor with 1 argument that is not explicit. [noExplicitConstructor]
    EdgeInitializer(const VertexId_P &_vertices,
    ^
ign-math/include/ignition/math/graph/Vertex.hh:63:13: style: Class 'Vertex' has a constructor with 1 argument that is not explicit. [noExplicitConstructor]
    public: Vertex(const std::string &_name,
            ^
ign-math/include/ignition/math/graph/GraphAlgorithms.hh:343:16: style: Consider using std::transform algorithm instead of a raw loop. [useStlAlgorithm]
      vertices.push_back(vPair.second.get());
               ^
ign-math/src/Frustum.cc:159:0: style: Consider using std::any_of algorithm instead of a raw loop. [useStlAlgorithm]
    if (plane.Side(_p) == Planed::NEGATIVE_SIDE)
^
ign-math/src/Kmeans_TEST.cc:51:10: style: Consider using std::transform algorithm instead of a raw loop. [useStlAlgorithm]
    elem += math::Vector3d(0.1, 0.2, 0.0);
         ^
ign-math/src/Temperature_TEST.cc:101:0: information: Unmatched suppression: knownConditionTrueFalse [unmatchedSuppression]
  EXPECT_TRUE(temp == temp2);
^
Built target cppcheck

This PR fixes all except the last one.

Checklist

• Signed all commits for DCO
• Added tests (N/A)
• 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

Note to maintainers: Remember to use Squash-Merge

[mjcarroll]

I think for the last one, the suppression comment can just be dropped.

[jwnimmer-tri]

I think for the last one, the suppression comment can just be dropped.

I've removed that line now. I had been wondering if I was running cppcheck incorrectly (or a different version, or something) where my results did not match with anyone else.