Add recipe for libzenohcxx package

[traversaro]

This PR fixes part of #26053 .

PR content

This PRs adds some a recipe for the C++ bindings for the Zenoh ecosystem (https://zenoh.io/), it is a follow up of #26736 .

In particular, it contains the a recipe for packages generated from the zenoh-cpp repository, that that generate the following packages (structure and naming inspired by the Debian and homebrew existing packages):

• libzenohcxx package, a header-only C++ library (no rust involved in it), that wraps either the zenoh-c rust library with a C interface packaged in libzenohc package, or the zenoh-pico C library (https:/eclipse-zenoh/zenoh-pico, currently not packaged in conda-forge).

As this is an header-only library, there is no rust involved, so zenoh-rust-abi package is not used here.

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.

[conda-forge-webservices]

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/zenoh-cpp/meta.yaml) and found it was in an excellent condition.

[github-actions]

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

[traversaro]

@conda-forge/help-c-cpp @conda-forge/staged-recipes the PR is ready for review, thanks!

[github-actions]

To help direct your pull request to the best reviewers, please mention a topic-specifc team if your recipe matches any of the following: conda-forge/help-c-cpp, conda-forge/help-cdts, conda-forge/help-go, conda-forge/help-java, conda-forge/help-julia, conda-forge/help-nodejs, conda-forge/help-perl, conda-forge/help-python, conda-forge/help-python-c, conda-forge/help-r, conda-forge/help-ruby,or conda-forge/help-rust. Thanks!