Take the catalogue's composition rules into the node-engine

ADR 0593 §7: the composer with its refusals leaves mesh-sdk, so mesh-sdk
carries no composition rule. The catalogue functions only the
node-engine's composition reaches (Resolve, Resolution's Compose,
Declaration, DataItems, LeftOut, Rules and the rest, the settings,
placeholder and template refusals, the rendering helpers) are copied
with their tests into internal/compose/resolution; a method of a
mesh-sdk shape becomes a function taking it first. The composition
calls its own copies, and the captured catalogue its tests read lives
here now, shared by mesh-compose's tests.

Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL

internal/compose/resolution/testdata/environment/all.posix

@@ -0,0 +1,26 @@
+# adwaita
+export GTK2_RC_FILES='/usr/share/themes/Adwaita-dark/gtk-2.0/gtkrc'
+export GTK_THEME='Adwaita:dark'
+export QT_QPA_PLATFORMTHEME='qt6ct'
+export QT_SELECT='6'
+export QT_STYLE_OVERRIDE='Fusion'
+export XCURSOR_SIZE='24'
+export XCURSOR_THEME='Adwaita'
+# clipmenu
+export CM_HISTLENGTH='15'
+export CM_MAX_CLIPS='500'
+export CM_SELECTIONS='clipboard'
+# i3
+export XDG_CURRENT_DESKTOP='i3'
+export XDG_SESSION_DESKTOP='i3'
+# xterm
+export TERMINAL='xterm'
+# zsh
+export EDITOR='vim'
+export VISUAL='vim'
+export XDG_CONFIG_HOME='/home/op/.config'
+# zsh
+case ":${PATH}:" in *':/home/op/scripts/bin:'*) ;; *) PATH='/home/op/scripts/bin'"${PATH:+:${PATH}}" ;; esac
+case ":${PATH}:" in *':/home/op/scripts:'*) ;; *) PATH='/home/op/scripts'"${PATH:+:${PATH}}" ;; esac
+case ":${PATH}:" in *':/home/op/.local/bin:'*) ;; *) PATH='/home/op/.local/bin'"${PATH:+:${PATH}}" ;; esac
+export PATH