Release 0.0.47: capability architecture + fresh-sandbox glibc default

- why/resolve --explain, capability-level doctor, capability->provider in
  BuildPlan, abi enforcement, per-build resolution.json
- profiles, features, backend=/provider= knobs, [package] platforms
- new --template gui; runtime closure (dep RUNPATH); Linux default glibc
- fresh-sandbox fixes: sysroot deps, shared gcc fixup + ownership guard,
  sysroot usability validation, -idirafter headers, -B/-L link runtime

Author: d2learn-org

mcpp.toml

@@ -1,6 +1,6 @@
 [package]
 name        = "mcpp"
-version     = "0.0.46"
+version     = "0.0.47"
 description = "Modern C++ build & package management tool"
 license     = "Apache-2.0"
 authors     = ["mcpp-community"]