Implement SDF 1.8 specification

[elpiel]

How to participate

💬⬇️ Comment below and mention the struct or Enum you'd like to implement.

This will ensure that there is no overlap in the PRs. Everybody will be happy 😊

📃 There should be written tests to make sure that the specification aligns with the implementation.

⚠️ Because of the way XML works, not distinguishing between an attribute <... this-is-attribute="Value" > and an element <this-is-element>Value</this-is-element>, you must be careful when writing the tests to make sure that the deserialized values match with the result you're expecting.

✔️ Open a PR when you're ready or if you're stuck or need feedback on your implementation.

Specifications

The XML specifications can be found on the official website:
http://sdformat.org/spec?ver=1.8

TODOs (Non-exhausive list):

of structs & enums that need to be implemented:

• Actor
• Light @hannydevelop
• Scene
• State @hannydevelop
• Physics @hannydevelop
• Link
• Sensor
• Joint
• Todo: add more structs

[hannydevelop]

Hello @elpiel my name is Ugochi, I'm a Rust developer. I'll love to work on the light, state and physics structs/enum

[elpiel]

Hello @elpiel my name is Ugochi, I'm a Rust developer. I'll love to work on the light, state and physics structs/enum

Great @hannydevelop! I've added you to the tasks and I will add additional information before the 1st of October to ease your work.