refactor into an importable library and keep an example

examples/basic-usage/migrations/001_create-tables.sql

@@ -0,0 +1,7 @@
+CREATE TABLE eventlog (
+                          eventid TEXT PRIMARY KEY,
+                          name TEXT NOT NULL,
+                          body BLOB,
+                          metadata BLOB,
+                          createdat TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);