Should convert Awatif model to DXF format

[madil4]

Requirements

• should export the model data to dxf format
• should have a function named exportToDXF located in /scr/Export/exportToDXF.ts

Example

const nodes = [[0, 0, 0], [5, 0, 0], [0, 0, 5]];
const elements = [[0, 1], [1, 2]];

const output = exportToDXF(nodes,elements);

output = `
  # Further planning is needed here to define the dxf file format
  0
  SECTION
  2
  ENTITIES
  0
  ENDSEC
  0
  EOF
`

[madil4]

Closed by #273