- Add an example file where we can pass a relative file path as an ar…

[marcobon90]

New Additions

• Added an example file for image conversion via CLI.
• Fixed Rust analyzer warnings in files animation_encoder.rs and encoder.rs (restored to avoid conflicts).

Notes

• I encountered some Rust analyzer warnings that could be reviewed in the future to improve code quality.
• I added lifetime 'a in return type to these functions:
  • pub fn from_image(image: &'a DynamicImage, timestamp: i32) -> Result<Self, &'a str> {
  • pub fn from_image(image: &'a DynamicImage) -> Result<Self, &'a str> {