Pg to bun (#148)

* start moving to bun

* changing more stuff

* more

* and yet more

* tests passing

* seems stable now

* more big changes

* small fix

* little fixes

vendor/github.com/uptrace/bun/dialect/pgdialect/unsafe.go

@@ -0,0 +1,18 @@
+// +build !appengine
+
+package pgdialect
+
+import "unsafe"
+
+func bytesToString(b []byte) string {
+	return *(*string)(unsafe.Pointer(&b))
+}
+
+func stringToBytes(s string) []byte {
+	return *(*[]byte)(unsafe.Pointer(
+		&struct {
+			string
+			Cap int
+		}{s, len(s)},
+	))
+}