add plasma svg library + first unit test

[yasstec]

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• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

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What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

• a feature to integrate plasma component library .

• add new folder : single-line-diagram-core/src/main/resources/PlasmaLibrary

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What is the new behavior (if this is a feature change)?

Does this PR introduce a breaking change or deprecate an API? If yes, check the following:

• The Breaking Change or Deprecated label has been added
• The migration guide has been updated in the github wiki (What changes might users need to make in their application due to this PR?)

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[flo-dup]

Replaced by #273