Add Set Schema Search Path as a rails til

rails/set-schema-search-path.md

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+# Set Schema Search Path
+
+By default the schema search path for a PostgreSQL database is going to be
+`"$user", public`. Tables created by a Rails migration are going to end up
+on the `public` schema by default. If your application has other schemas in
+play, then you may want to ensure that those schemas are also on the schema
+search path. This can be accomplished by adding the `schema_search_path`
+setting to your `database.yml` file. For instance, to include both the
+`legacy` and `public` schema in the Postgres search path, add the following
+line:
+
+```ruby
+schema_search_path: "legacy,public"
+```
+
+h/t Jack Christensen