feat(mkrep): add directory + git-repo scaffolding command

mkcd's create-and-cd behavior plus git init, remote linking, and
optional remote creation via a user-configured command template
($MKREP_REMOTE_CMD, {name}/{user} placeholders).

functions/_mkrep_say.fish

@@ -0,0 +1,20 @@
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# SYNOPSIS
+#   _mkrep_say <silent> <message>
+#
+# DESCRIPTION
+#   Prints <message> unless <silent> is 1. Used by mkrep for its default
+#   per-step summary lines, which -s/--silent must suppress entirely.
+#
+# ARGUMENTS
+#   silent    1 to suppress output, 0 to print
+#   message   Text to print (echo -e, so escapes/colour codes render)
+#
+# EXIT STATUS
+#   0  always
+function _mkrep_say --argument-names silent msg
+    test "$silent" = 1; and return 0
+    echo -e $msg
+end