Issue 3511296: Adding JS Block library tool

Closes #3511296

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• a7905e52 - Updating to attach with once and adding additional data target support

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• 95a2cf1e - Moving structure for build tools

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added 7 commits

• 95a2cf1e...3e5c8b52 - 4 commits from branch project:5.x
• d37939f0 - Issue 3511296: Adding JS Block library tool
• e86e6f70 - Updating to attach with once and adding additional data target support
• 6cf12604 - Moving structure for build tools

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merged