feat(federation): add scenario-mastodon setup and teardown (#1274)

2/5 taken out of #1269

This patch adds the setup and teardown of Mastodon for use in the end-to-end tests

Co-Authored-By: zam <mirco.zachmann@meissa.de>
Co-Authored-By: erik <erik.seiert@meissa-gmbh.de>
Co-Authored-By: Michael Jerger <michael.jerger@meissa-gmbh.de>

Reviewed-on: https://code.forgejo.org/forgejo/end-to-end/pulls/1274
Reviewed-by: earl-warren <earl-warren@noreply.code.forgejo.org>
Reviewed-by: Beowulf <beowulf@noreply.code.forgejo.org>
Co-authored-by: famfo <famfo@famfo.xyz>
Co-committed-by: famfo <famfo@famfo.xyz>

federation/scenario-mastodon/setup.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+source "$SCENARIO_DIR/../../lib/lib.sh"
+source "$SCENARIO_DIR/functions.sh"
+
+echo "Setting up Forgejo x Mastodon"
+
+if [[ ! -d "$DIR" ]]; then
+    mkdir -p "$DIR"
+fi
+
+echo "Generating forgejo & mastodon self-signed certificate"
+
+generate_certs forgejo "$SCENARIO_DIR/resources/certs"
+
+mv "$SCENARIO_DIR/resources/certs/forgejo"* "$SCENARIO_DIR/forgejo/certs/"
+
+export MASTODON_HOST="localhost"
+
+podman-compose \
+    -f "$SCENARIO_DIR/compose.yaml" \
+    up -d
+
+function wait_up() {
+    command="$(podman-compose \
+        -f "$SCENARIO_DIR/compose.yaml" \
+        exec mastodon-app \
+        bin/tootctl accounts
+    )"
+
+    first="$(head -n 1 <<< "$command")"
+    [[ "$first" == *"Commands:"* ]] && echo "ready"
+}
+
+retry wait_up
+
+password="$(podman-compose \
+    -f "$SCENARIO_DIR/compose.yaml" \
+    exec mastodon-app \
+    bash -c "/init/create_test_account.sh" | \
+    tail -n 1 | \
+    sed 's/\r//'
+)"
+
+cat << EOF > "$DIR/federation_scenario-mastodon-env"
+password="$password"
+port="4000"
+EOF