Describe the issue

glTF uses URI for its asset path.

KhronosGroup/glTF#1744
https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#uris

Currently TinyGLTF implements simple URI decoding only:

Proper and strict URI decoding/encoding are recommended.
urlparser https://uriparser.github.io/ Could be a good candidate to handle URI path.

Also, it would need to provide a way to handle absolute URI(e.g. URI containing http prefix) through FS callback.

To Reproduce

• OS
  Any
• Compiler, compiler version, compile options
  Any
• Please attach minimal and reproducible .glTF file if you got an issue related to .glTF data
  N/A

Expected behaviour

TinyGLTF decodes/encodes URIs correctly.

We may need glTF files containing various URIs to test.