Add sqlite-lint to 'pkg/schema/lint'

pkg/schema/lint/test_schemas/failure-no-strict.sql

@@ -0,0 +1,13 @@
+create table stuff (
+    rowid integer primary key,
+    data text not null,
+    amount integer not null
+) strict;
+create index index_stuff_amount on stuff (amount);
+
+create table stuff2 (
+    weird_pk integer primary key,
+    label text not null unique,
+    stuff_id integer references stuff(rowid),
+    alternative_stuff_id integer references stuff(amount)
+);