DYN-7156: initialize libview only once

[pinzart90]

Purpose

https://jira.autodesk.com/browse/DYN-7156
LibraryView is initialized in the Revit context. This means that when you try to create a single node, multiple nodes are place inside the workspace.
This PR ensure that the node library view is initialzied only once

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

Fix issue where multiple nodes are created when selecting a single node from the libray view.

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FYIs

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[github-actions]

See the ticket for this pull request: https://jira.autodesk.com/browse/DYN-7156

[pinzart90]

Looking into tests...