Mnesia wrapper for Elixir

[shahryarjb]

I will create Mnesia wrapper for Elixir with livebook examples and testing. it includes some guard and entries behaviour to be like a assistant for you in another version I will try to create mix for this and mixed with our macro

Features:

• We need a function or macro to wait tables, has retry counter
• We need CRUD functions or which are created by macro
• We need Pagination strategies and should be an option for read
• We need unique field checker
• We need id_tracker template

[shahryarjb]

Add some Mnesia functions without testing, wrapper: 2894719

[shahryarjb]

Add some mnesia functions without testing, wrapper v2: 9a79e88