refactor: structure of an hexagonal architecture

Created a kernel crate to store models and future action implementations.
Will be useful to create admin cli.

tests/hurl_integration/run_scenario.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/sh
+
+set -eou pipefail
+
+scenario_name="$1"
+project_root="$(dirname $(cargo locate-project | jq -r .root))"
+scenario_dir="$project_root/tests/hurl_integration/$1"
+scenario_tmp_dir_path="$project_root/tmp/tests/$scenario_name"
+database_path="$project_root/tmp/tests/$scenario_name/minauthator.db"
+
+echo "Starting scenario $scenario_name."
+mkdir -p $scenario_tmp_dir_path
+if [ -f $database_path ]; then
+    rm $database_path
+fi
+sqlite3 $database_path < $project_root/migrations/all.sql
+
+export DB_PATH=$database_path
+if [ -f $scenario_dir/init_db.sh ]; then
+    $scenario_dir/init_db.sh
+fi
+
+pkill -f $project_root/target/debug/minauthator-server &
+sleep 0.1
+$project_root/target/debug/minauthator-server \
+    --config "$scenario_dir/config.toml" \
+    --database  $database_path \
+    --listen-host "127.0.0.1" \
+    --listen-port "8086" \
+    --static-assets "$project_root/assets" &
+
+server_pid=$!
+sleep 0.2
+hurl \
+    --variable base_url="http://localhost:8086" \
+    --test --error-format long \
+    $scenario_dir/main.hurl
+kill $server_pid
+echo "End of scenario."