fix: fix mise tool installation

tools.d/mise.bash

@@ -1,7 +1,18 @@
 #!/bin/bash
 
-# Install mise-en-place
+# mise-en-place (https://mise.jdx.dev/)
 
-if (command -v mise &>/dev/null); then
+# Install
+
+if (! command -v mise &>/dev/null); then
 	curl https://mise.run | sh
 fi
+
+if (command -v mise &>/dev/null); then
+	# Activate
+	eval "$(mise activate bash)"
+	mise settings set experimental true
+	# Install some plugins
+	(mise where usage &>/dev/null) || mise use -g usage # for completion
+	# mise use -g cargo:ubi # to install binaries from Github release
+fi