Fork huandu/go-sqlbuilder v1.39.1 to hanzoai/sqlbuilder; debrand ClickHouse flavor -> Datastore

- go.mod module path -> github.com/hanzoai/sqlbuilder (package name kept: sqlbuilder)
- Rename exported Flavor constant ClickHouse -> Datastore (same iota ordinal 6,
  behavior byte-identical): const decl, all case labels (Interpolate/Quote/
  PrepareInsertIgnore/args/select/union), Flavor.String() literal "ClickHouse"
  -> "Datastore", and the name<->flavor test map.
- Rename unexported dialect helper clickhouseInterpolate -> datastoreInterpolate.
- Rename example ExampleInsertBuilder_insertIgnore_clickhouse -> _datastore.
- Update tests + README flavor list to Datastore.
- Keep upstream MIT LICENSE; add NOTICE recording the fork + rename.

Dialect SQL output unchanged; only the identifier is renamed.

interpolate_test.go

@@ -195,47 +195,47 @@ func TestFlavorInterpolate(t *testing.T) {
 			"", ErrInterpolateUnsupportedArgs,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT * FROM a WHERE name = ? AND state IN (?, ?, ?, ?, ?)", []interface{}{"I'm fine", 42, int8(8), int16(-16), int32(32), int64(64)},
 			"SELECT * FROM a WHERE name = 'I\\'m fine' AND state IN (42, 8, -16, 32, 64)", nil,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT * FROM `a?` WHERE name = \"?\" AND state IN (?, '?', ?, ?, ?, ?, ?)", []interface{}{"\r\n\b\t\x1a\x00\\\"'", uint(42), uint8(8), uint16(16), uint32(32), uint64(64), "useless"},
 			"SELECT * FROM `a?` WHERE name = \"?\" AND state IN ('\\r\\n\\b\\t\\Z\\0\\\\\\\"\\'', '?', 42, 8, 16, 32, 64)", nil,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT ?, ?, ?, ?, ?, ?, ?, ?, ?", []interface{}{true, false, float32(1.234567), 9.87654321, []byte(nil), []byte("I'm bytes"), dt, time.Time{}, nil},
 			"SELECT TRUE, FALSE, 1.234567, 9.87654321, NULL, unhex('49276D206279746573'), '2019-04-24 12:23:34.123457', '0000-00-00', NULL", nil,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT '\\'?', \"\\\"?\", `\\`?`, \\?", []interface{}{MySQL},
 			"SELECT '\\'?', \"\\\"?\", `\\`?`, \\'MySQL'", nil,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT ?", []interface{}{byteArr},
 			"SELECT unhex('666F6F')", nil,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT ?", nil,
 			"", ErrInterpolateMissingArgs,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT ?", []interface{}{complex(1, 2)},
 			"", ErrInterpolateUnsupportedArgs,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT ?", []interface{}{[]complex128{complex(1, 2)}},
 			"", ErrInterpolateUnsupportedArgs,
 		},
 		{
-			ClickHouse,
+			Datastore,
 			"SELECT ?", []interface{}{errorValuer(1)},
 			"", ErrErrorValuer,
 		},