Add support for Homebrew and Chocolatey (#9187)

stubs/pycurl/METADATA.toml

@@ -2,5 +2,15 @@ version = "7.45.*"
 
 [tool.stubtest]
 ignore_missing_stub = false
+# Install on Windows requires building PycURL from source
+#
+# Install on MacOS is too complicated for the CI and does not work with stubtest:
+# % brew install openssl
+# % export LDFLAGS="-L/usr/local/opt/openssl@3/lib"
+# % export CPPFLAGS="-I/usr/local/opt/openssl@3/include"
+# % pip install --compile --install-option="--with-openssl" pycurl
+# TODO: Test on Windows and/or MacOS once wheels are available.
 platforms = ["linux"]
 apt_dependencies = ["libcurl4-openssl-dev"]
+# No need to install on the CI. Leaving here as information for MacOS contributors.
+# brew_dependencies = ["openssl"]