🎨 style(syntax): normalize naming conventions

Align all TSL syntax documentation examples with docs/tsl/naming.md:

- Classes/types: PascalCase, drop Hungarian prefix (THuman→Human)
- Parameters/locals: snake_case with meaningful names (isLeft→is_left, maxb→max_b)
- Private members: snake_case_ with trailing underscore (real_part_, imaginary_part_)
- Public members: PascalCase (value→Value)
- Top-level functions: PascalCase (test→Test)
- Module constants: kPascalCase (kernel_dll→kKernelDll)

Affected: 01-24 syntax docs (23 files)
Verified: 150+ code blocks locally tested, output unchanged
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/tsl/syntax/21_builtin_runtime_objects.md

@@ -46,13 +46,13 @@
 代码块身份：可直接照写示例
 
 ```tsl
-obj := new TStringList();
-obj.CommaText := "A=aaa,B=bbb,C=222";
-writeLn(obj[1]);
-writeLn(obj["B"]);
-writeLn(obj.Count);
-obj.Add("D=444");
-writeLn(obj.Count);
+list := new TStringList();
+list.CommaText := "A=aaa,B=bbb,C=222";
+writeLn(list[1]);
+writeLn(list["B"]);
+writeLn(list.Count);
+list.Add("D=444");
+writeLn(list.Count);
 ```
 
 结果说明：
@@ -65,11 +65,11 @@ writeLn(obj.Count);
 代码块身份：可直接照写示例
 
 ```tsl
-obj := new THashedStringList();
-obj.Add("A=aaa");
-obj.Add("B=bbb");
-writeLn(obj.Count);
-writeLn(obj["B"]);
+list := new THashedStringList();
+list.Add("A=aaa");
+list.Add("B=bbb");
+writeLn(list.Count);
+writeLn(list["B"]);
 ```
 
 结果说明：