[main < E-node] Merge node functions into main

[imilinovic]

Description

Implement node functions

Pull request type

• [ ] Bugfix
• [X] Algorithm/Module
• [ ] Feature
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

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Reviewer checklist (the reviewer checks this part)

Module/Algorithm

• [ ] Core algorithm/module implementation
• [ ] Query module implementation
• [ ] Unit tests
• [ ] End-to-end tests
• [ ] Code documentation
• [ ] README short description
• [ ] Documentation on memgraph/docs
• [ ] Update GQLALchemy signatures in query builder using query module signature generator

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