Add libpinch v1.2.1

[eunos-1128]

This pull request introduces a new recipe for the libpinch library, enabling its build and packaging for multiple platforms. The main changes include adding build scripts for Windows and Unix, applying patches to improve compatibility, and specifying package metadata and requirements.

Build scripts and platform support:

• Added build.sh for Unix platforms and build.bat for Windows, enabling automated build, test, and installation steps tailored to each environment. [1] [2]

Packaging and metadata:

• Created recipe.yaml specifying package metadata, source location, build requirements, runtime dependencies, test configuration, and maintainer information.

Patches for compatibility:

• Added fix-include-target_sources.patch to correct the header file location in CMakeLists.txt, ensuring headers are properly installed.
• Added remove-include-factory-header.patch to remove unnecessary cryptopp/factory.h includes, resolving compatibility issues with conda-forge's cryptopp package.

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Checklist

• Title of this PR is meaningful: e.g. "Adding my_nifty_package", not "updated meta.yaml".
• License file is packaged (see here for an example).
• Source is from official source.
• Package does not vendor other packages. (If a package uses the source of another package, they should be separate packages or the licenses of all packages need to be packaged).
• If static libraries are linked in, the license of the static library is packaged.
• Package does not ship static libraries. If static libraries are needed, follow CFEP-18.
• Build number is 0.
• A tarball (url) rather than a repo (e.g. git_url) is used in your recipe (see here for more details).
• GitHub users listed in the maintainer section have posted a comment confirming they are willing to be listed there.
• When in trouble, please check our knowledge base documentation before pinging a team.

[github-actions]

Hi! This is the staged-recipes linter and your PR looks excellent! 🚀

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/libpinch/recipe.yaml) and found it was in an excellent condition.

[eunos-1128]

@conda-forge/help-c-cpp, ready for review!

[eunos-1128]

@conda-forge-admin, please ping conda-forge/help-c-cpp

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-webservice.

I was asked to ping @conda-forge/help-c-cpp and so here I am doing that.

[wolfv]

@traversaro since you had the final look, would you also like to merge?

[danielnachun]

Can you also make separate build.sh and build.bat scripts here? These scripts are long enough that they should be in their own files and will make the main recipe much easier to read.

[eunos-1128]

Ready to be merged.