feat: Add CalendarSelector component and install new dependencies.

node_modules/concurrently/docs/cli/configuration.md

@@ -0,0 +1,11 @@
+# Configuration
+
+You might want to configure concurrently to always have certain flags on.
+Any of concurrently's flags can be set via environment variables that are prefixed with `CONCURRENTLY_`.
+
+```bash
+$ export CONCURRENTLY_KILL_OTHERS=true
+$ export CONCURRENTLY_HANDLE_INPUT=true
+# Equivalent to passing --kill-others and --handle-input
+$ concurrently nodemon "echo 'hey nodemon, you won't last long'"
+```