✨ feat(iris): 新增 InterSystems IRIS 数据源支持

- 后端新增 IRIS 连接、查询、DDL、索引元数据和 DataGrid 编辑能力
- 接入 optional driver-agent、构建标签、revision 生成和变更检测流程
- 前端新增 IRIS 连接入口、方言映射、能力配置和图标展示
- 修复 IRIS 主键识别、事务开启错误处理和驱动连接关闭问题
- 补充后端、前端和构建脚本相关回归测试
Refs #408

third_party/go-irisnative/PATCHES.md

@@ -0,0 +1,11 @@
+Local patch against github.com/caretdev/go-irisnative v0.2.1:
+
+- Added `//go:build !windows` to `src/connection/user_posix.go`.
+  Upstream ships `user_windows.go` with a Windows filename suffix, but
+  `user_posix.go` has no build constraint, so Windows builds compile both
+  files and fail with `userCurrent redeclared`.
+- Made `Connection.Disconnect` close the underlying TCP connection after
+  sending the protocol disconnect message, so `database/sql` closes do not
+  leak sockets.
+- Made `Connection.BeginTx` return the `START TRANSACTION` error instead of
+  marking the connection as in-transaction when the server rejected the begin.