Init, adding corrade,magnum,magnum-plugins,magnum-integration,magnum-extras, and magnum-examples 2025.47_1

common/environment/README

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+ENVIRONMENT SHELL SNIPPETS
+==========================
+
+This directory contains shell files (must not be executable nor contain a shebang)
+that are read by xbps-src when building source packages. The shell files
+are read in lexical order (as ordered by shell rules).
+
+These files shall set or unset environment variables while building packages.
+Only files with the `.sh' extension are read, so this file will be simply ignored.
+
+The following directories are used to set the order in which the shell snippets
+should be read by xbps-src:
+
+	* build-style	(to set vars for a specific build_style helper)
+	* setup		(before reading template)
+	* setup-subpkg	(before running the subpkg <pkgname>_package() function)
+	* fetch		(before running fetch phase)
+	* extract	(before running extract phase)
+	* configure	(before running configure phase)
+	* build		(before running build phase)
+	* check		(before running check phase)
+	* install	(before running install phase)
+	* pkg		(before running pkg phase)
+
+NOTES
+~~~~~
+* Symlinks can be created (relative) to make a shell snippet available in
+  multiple phases.