[FEATURE][DEVELOP] Create UI window

[iwatake2222]

The reason WHY this new feature is needed

1. A user inputs angles in a selected representation
2. The program converts the input angles to all the other representations
3. The program also draw the object with the specified rotation

Describe WHAT this new feature is

• In this issue, we will implement UIs for 1 and 2

HOW to achieve this new feature

• Create components for input
• Create components for output
• Create class or structure to contain data
  • but no calculation will be implemented yet

Related issues

• Parent issue
  • [FEATURE][DEVELOP] Integrate Dear ImGui #8
• Related issue
  • None

Additional context

None