V0.2 backend dynamic node support

[chaosddp]

Description

Main changes:

1. use an enum like class to specified attribute,

2. support more attribute data type for both 2 backends.

3. use a simple string template to generate dup codes before compiling.

4. a backend write with c++ to support dynamic attributes

5. add 2 attribute parameters,
   const: same as normal, but not copied into snapshot list, can be queried even without snapshot taking (must specified a tick for padding)
   list: dynamic length attribute, support remove, append, clear, resize and slice accessing.

   An attribute cannot both be const and list, it will cause an error.

# Linked issue(s)/Pull request(s)

#109
#110
#141

Type of Change

• Non-breaking bug fix
• Breaking bug fix
• New feature
• Test
• Doc update
• Docker update

Related Component

• Simulation toolkit
• RL toolkit
• Distributed toolkit

Has Been Tested

• OS:
  • Windows
  • Mac OS
  • Linux
• Python version:
  • 3.6
  • 3.7
• Key information snapshot(s):

Needs Follow Up Actions

• New release package
• New docker image

Checklist

• Add/update the related comments
• Add/update the related tests
• Add/update the related documentations
• Update the dependent downstream modules usage