Rebranding Openblocks to Lowcoder

As part of the project transfer, we need to replace all Openblocks references to Lowcoder equivalent.

Checklist

• Java API renamed
• Java tests OK
• Java build OK
• Javascript Client renamed
• Javascript Client tests OK
• Javascript Client build OK
• Javascript Client pushed to NPM
• Nodejs Server renamed
• Nodejs Server tests OK
• Nodejs Server build OK
• Docker renamed
• Docker build OK
• Docker pushed to Docker Hub
• Documentation updated from Openblocks to Lowcoder
• Documentation removed references to EE