feat: 新增 DuckDB 方言支持及 SQLite3 自动注册 IF 函数

- 新增 dialect/duckdb 方言，支持 DuckDB SQL 语法
- 新增 schema/dialect/duckdb DDL 操作支持
- dialect/sqlite3: 注册 sqlite3_with_if 驱动，连接时自动注册 IF() 函数
- engine: MakeConnection 对 sqlite3 自动使用带 IF 支持的驱动
- engine: 新增 DBConfig DuckDB 配置项及相关 Option 函数
- 统一各方言测试引用路径

go.mod

@@ -1,24 +1,43 @@
 module git.fsdpf.net/go/db
 
-go 1.19
+go 1.24
+
+toolchain go1.24.10
 
 require (
 	github.com/DATA-DOG/go-sqlmock v1.5.0
-	github.com/denisenkom/go-mssqldb v0.12.3
 	github.com/go-sql-driver/mysql v1.7.1
 	github.com/lib/pq v1.10.9
+	github.com/marcboeker/go-duckdb v1.8.5
 	github.com/mattn/go-sqlite3 v1.14.17
+	github.com/microsoft/go-mssqldb v1.9.4
 	github.com/samber/lo v1.49.1
 	github.com/stretchr/testify v1.10.0
 )
 
 require (
+	github.com/apache/arrow-go/v18 v18.1.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-viper/mapstructure/v2 v2.2.1 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
 	github.com/golang-sql/civil v0.0.0-20220223132316-b832511892a9 // indirect
 	github.com/golang-sql/sqlexp v0.1.0 // indirect
+	github.com/google/flatbuffers v25.1.24+incompatible // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.17.11 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.9 // indirect
+	github.com/pierrec/lz4/v4 v4.1.22 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rogpeppe/go-internal v1.14.1 // indirect
 	github.com/stretchr/objx v0.5.2 // indirect
-	golang.org/x/crypto v0.11.0 // indirect
-	golang.org/x/text v0.21.0 // indirect
+	github.com/zeebo/xxh3 v1.0.2 // indirect
+	golang.org/x/crypto v0.38.0 // indirect
+	golang.org/x/exp v0.0.0-20250128182459-e0ece0dbea4c // indirect
+	golang.org/x/mod v0.22.0 // indirect
+	golang.org/x/sync v0.14.0 // indirect
+	golang.org/x/sys v0.33.0 // indirect
+	golang.org/x/text v0.25.0 // indirect
+	golang.org/x/tools v0.29.0 // indirect
+	golang.org/x/xerrors v0.0.0-20240903120638-7835f813f4da // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )