建立四模块 CMake 骨架与 line1 样例。

- compiler / vm 空静态库，host 可执行打印版本
- 顶层解开 add_subdirectory，tests 接入 CTest（host_version 通过）
- examples/line1 落地 project.toml 与三个 .st
- Types.h 注释补饱和规则，与 Doc/isa 一致
- .gitignore 忽略 Doc/会话记录.md

examples/line1/globals.st

@@ -0,0 +1,7 @@
+(* globals.st *)
+VAR_GLOBAL
+    EmergencyStop : BOOL := FALSE;
+    I0_0 : BOOL;
+    I0_1 : BOOL;
+    Q0_0 : BOOL;
+END_VAR

examples/line1/main.st

@@ -0,0 +1,8 @@
+(* main.st *)
+PROGRAM MAIN
+VAR
+    starter : MotorStarter;
+END_VAR
+    starter(start := I0_0, stop := I0_1);
+    Q0_0 := starter.Q;
+END_PROGRAM

examples/line1/motor.st

@@ -0,0 +1,13 @@
+(* motor.st *)
+FUNCTION_BLOCK MotorStarter
+VAR_EXTERNAL
+    EmergencyStop : BOOL;
+END_VAR
+VAR_INPUT
+    start, stop : BOOL;
+END_VAR
+VAR_OUTPUT
+    Q : BOOL;
+END_VAR
+    Q := start AND NOT stop AND NOT EmergencyStop;
+END_FUNCTION_BLOCK

examples/line1/project.toml

@@ -0,0 +1,28 @@
+[project]
+name = "line1"
+entry = "program MAIN"
+cycle_limit = 100000
+dt_ms = 10
+
+[files]
+st = ["globals.st", "motor.st", "main.st"]
+
+# 全工程只允许这一处出现 VAR_GLOBAL（第一版：单个文件）
+[gvl]
+file = "globals.st"
+
+# 可选：I/O 绑定。不创造变量，var 必须已在 GVL 里声明
+[[io.input]]
+var = "EmergencyStop"
+channel = 0
+bit = 2
+
+[[io.input]]
+var = "I0_0"
+channel = 0
+bit = 0
+
+[[io.output]]
+var = "Q0_0"
+channel = 0
+bit = 0