deps: Add build recipe for GIF

[hisergiorojas]

Description

As requested in https://github.com/AcademySoftwareFoundation/OpenImageIO/issues/4387.

Checklist:

• [ x] I have read the contribution guidelines.
• [ ] I have updated the documentation, if applicable. (Check if there is no need to update the documentation, for example if this is a bug fix that doesn't change the API.)
• [ ] I have ensured that the change is tested somewhere in the testsuite (adding new test cases if necessary).
• [ ] If I added or modified a C++ API call, I have also amended the corresponding Python bindings (and if altering ImageBufAlgo functions, also exposed the new functionality as oiiotool options).
• [ ] My code follows the prevailing code style of this project. If I haven't already run clang-format before submitting, I definitely will look at the CI test that runs clang-format and fix anything that it highlights as being nonconforming.

[lgritz]

How did you test this and verify that it works?

[hisergiorojas]

I'm still working on the pull request -

Here's what I'm currently doing to test and verify the CMake files:

1. I've turned on the "ignore homebrew-installed dependencies" option in the CMakeLists.txt file.
2. Then I'm building with these commands:

mkdir build
cd build
cmake .. -DOpenImageIO_BUILD_MISSING_DEPS=all

This makes CMake to build all dependencies locally instead of using system-installed versions.

[hisergiorojas]

[hisergiorojas]

[hisergiorojas]

Another way to test and verify:

1. To build oiiotool specifically, you can continue the build process with:

make -j8 # Adjust based on the number of CPU cores

2. Once the build completes, you can verify GIF support by:

a. Converting an image to GIF format: ./bin/oiiotool path/to/some/image.jpg -o test_output.gif

b. You can also try to convert a GIF to another format to further verify that it's working: ./bin/oiiotool ~/Downloads/earth.gif -o earth.jpg

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: hisergiorojas / name: Sergio Rojas (0f7a5592d0f8d8992b12ac2ffb109169334fecde, 34ba5403fd831410c96ecf0d8430f372f51073bd)

[lgritz]

This PR has been idling for a while, I think because it never quite passed CI. Is this something you're going to return to, @hisergiorojas? Maybe we should start by rebasing it on top of the current main and see what, if anything, is still broken?

[lgritz]

Closing. This never fully passed CI, the PR has sat idle for months without the author fixing it, and in the mean time, somebody else has fully implemented it in #4921. Sincere thanks for trying to implement this; it's ok, not all PRs work out. The effort is appreciated.