chore(comments): Test 仓注释英文化（R11）

把 81 个 .vp 文件的中文 # 注释与三引号文档串改写为简洁英文，每个连续注释块 <=2 行；运行时中文字符串字面量（testcheck.begin/print 等用户可见消息）保持原样。骨架比对 HEAD 与工作区 112 文件漂移 0，全量 77/77 顺序回归通过。

CharTest/App/main.vp

@@ -8,23 +8,23 @@ def bump(v: char) -> char:
 
 
 def main() -> int | t.CExport:
-    # 1) char 注解：char = t.CChar = i8（标量内置类型，非指针）
+    # 1) char annotation: char = t.CChar = i8 (scalar builtin, not a pointer)
     ch: char = 65
     stdio.printf("1 char annot: %d (expect 65)\n", int(ch))
 
-    # 2) char() 强转 int→char：300 trunc 到 i8 → 44
+    # 2) char() cast int to char: 300 truncates to i8, giving 44
     big: char = char(300)
     stdio.printf("2 char cast trunc: %d (expect 44)\n", int(big))
 
-    # 3) 函数返回 char（i8 存储）
+    # 3) Function returns char (stored as i8)
     nx: char = bump(ch)
     stdio.printf("3 char return: %d (expect 66)\n", int(nx))
 
-    # 4) 单字符字面量 'Z' 赋给 char（90）
+    # 4) Single-char literal 'Z' assigned to char (90)
     lit: char = 'Z'
     stdio.printf("4 char literal: %d (expect 90)\n", int(lit))
 
-    # 5) char 参与算术（i8 与 int 混合提升）
+    # 5) char in arithmetic (i8 promoted when mixed with int)
     s: int = ch + 1
     stdio.printf("5 char arith: %d (expect 66)\n", s)