Import mcp-to-cli from the rhema workspace

The crate maps MCP tool catalogs to clap commands and back, and has no
rhema dependencies — it was in-tree only because the workspace glob
reached it. Its own repository gives it its own release cadence and
its own crates.io token, scoped to this crate alone.

examples/fetch-github-snaps.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+# Fetch github-mcp-server's real tool definitions (the `__toolsnaps__`
+# the upstream test suite snapshots) into a scratch directory, for the
+# catalog example to build a full command tree from. Not a test
+# fixture: the full set lives out of the tree, the trimmed fixtures in
+# tests/fixtures/ are the committed matrix.
+#
+#   crates/mcp-to-cli/examples/fetch-github-snaps.sh /tmp/snaps
+set -eu
+dir=${1:?usage: fetch-github-snaps.sh <target-dir>}
+mkdir -p "$dir"
+base=https://raw.githubusercontent.com/github/github-mcp-server/main/pkg/github/__toolsnaps__
+curl -sfL "https://api.github.com/repos/github/github-mcp-server/contents/pkg/github/__toolsnaps__" |
+    jq -r '.[].name' |
+    xargs -P 8 -I{} curl -sfL "$base/{}" -o "$dir/{}"
+echo "$(ls "$dir" | wc -l | tr -d ' ') tool definitions in $dir"