chore(test): 初始化回归测试仓（新增 .gitignore，TestsOverview.md 改为 README.md）

把 Test/ 纳入 https://git.gvsds.com/GVSDS/Viper_RegressionTesting 。

1) 新增 .gitignore —— 只保留测试源码，剔除全部构建产物：
   目录   **/output*/（output / output_opt / output_orig / output_verify / output_dbg）、
          **/temp*/（temp / temp_opt）、**/.tpv_build/
   二进制 *.exe *.obj *.o *.out *.a *.lib *.dll
   中间物 *.ll *.vpi *.pyi *.deps.txt *.deps.json *.doc.json *_sha1_map.txt
          _pyi_cache_v1.pkl _pyi_cache_v1.sig.json _shared_sym.json _phase1_manifest.json
   其它   build_all.txt（构建日志）、*.log、__pycache__/、*.bak、IDE 目录
   保留   App/*.vp、project.json / project_opt.json / project.vpj、README.md、两个 .py
   实测 `git add -A --dry-run`：196 个文件，无任何构建产物混入。

2) TestsOverview.md → README.md（作为仓库首页文档）。

3) SequentialRegressionTest.py：7 处 TestsOverview.md 引用同步改为 README.md
   （文档串、OVERVIEW 路径、read_test_order 文档与报错文案、argparse description、
   启动横幅）；同时修正入口路径 PROJECTRANS —— 旧值 <root>/Projectrans.py 已不存在，
   改为 <root>/TransPyC/Projectrans.py（与 regression_test.py:45-48 记录一致），
   否则本脚本会以 "can't open file" 全量失败。
   regression_test.py 无需改动：它按目录扫描 project.json 找项目，不引用该文档。

GenericTest4/App/main.vp

@@ -0,0 +1,109 @@
+import t
+import stdio
+import testcheck
+
+# ============================================================
+# Test 1: 泛型类手动传类型参数 - Box[t.CInt](v)
+# ============================================================
+class Box[T]():
+    value: T
+
+    def __init__(self, v: T):
+        self.value = T(v)
+
+    def get(self) -> T:
+        return self.value
+
+    def set(self, v: T):
+        self.value = T(v)
+
+def test_explicit_box():
+    testcheck.section("Test 1: Box[t.CInt](42)")
+    b = Box[t.CInt](42)
+    v: t.CInt = b.get()
+    testcheck.check(v == 42, "Box[t.CInt](42).get() = 42", "expect 42")
+
+# ============================================================
+# Test 2: 泛型类手动传类型参数 - Pair[t.CInt, t.CInt]
+# ============================================================
+class Pair[T1, T2]():
+    first: T1
+    second: T2
+
+    def __init__(self, a: T1, b: T2):
+        self.first = T1(a)
+        self.second = T2(b)
+
+    def sum_as_int(self) -> t.CInt:
+        return t.CInt(self.first) + t.CInt(self.second)
+
+def test_explicit_pair():
+    testcheck.section("Test 2: Pair[t.CInt, t.CInt](10, 20)")
+    p = Pair[t.CInt, t.CInt](10, 20)
+    r: t.CInt = p.sum_as_int()
+    testcheck.check(r == 30, "Pair[t.CInt,t.CInt](10,20).sum = 30", "expect 30")
+
+# ============================================================
+# Test 3: 泛型类手动传 + 自动推导混合
+# ============================================================
+class Wrapper[T]():
+    data: T
+
+    def __init__(self, v: T):
+        self.data = T(v)
+
+    def get(self) -> T:
+        return self.data
+
+def test_mixed_generic_class():
+    testcheck.section("Test 3: mixed explicit and inferred")
+    # 手动传
+    w1 = Wrapper[t.CInt](100)
+    # 自动推导
+    w2 = Wrapper(200)
+    r1: t.CInt = w1.get()
+    r2: t.CInt = w2.get()
+    testcheck.check(r1 == 100 and r2 == 200, "Wrapper[t.CInt](100)=100 Wrapper(200)=200", "expect 100 200")
+
+# ============================================================
+# Test 4: 泛型类手动传 - 方法调用
+# ============================================================
+class Counter[T]():
+    count: T
+
+    def __init__(self, start: T):
+        self.count = T(start)
+
+    def increment(self):
+        self.count = self.count + T(1)
+
+    def get_count(self) -> T:
+        return self.count
+
+def test_explicit_counter():
+    testcheck.section("Test 4: Counter[t.CInt](0) with methods")
+    c = Counter[t.CInt](0)
+    c.increment()
+    c.increment()
+    c.increment()
+    r: t.CInt = c.get_count()
+    testcheck.check(r == 3, "Counter[t.CInt](0) +3 = 3", "expect 3")
+
+# ============================================================
+# Test 5: 泛型类手动传 - set 方法
+# ============================================================
+def test_explicit_box_set():
+    testcheck.section("Test 5: Box[t.CInt] set method")
+    b = Box[t.CInt](10)
+    b.set(99)
+    v: t.CInt = b.get()
+    testcheck.check(v == 99, "Box[t.CInt].set(99) get = 99", "expect 99")
+
+def main() -> t.CInt:
+    testcheck.begin("GenericTest4: 泛型结构体手动传类型参数")
+    test_explicit_box()
+    test_explicit_pair()
+    test_mixed_generic_class()
+    test_explicit_counter()
+    test_explicit_box_set()
+    return testcheck.end()

GenericTest4/project.json

@@ -0,0 +1,40 @@
+{
+    "$schema": "https://raw.githubusercontent.com/TermiNexus/TransPyC/main/schemas/project-schema.json",
+    "name": "GenericTest4",
+    "version": "1.0.0",
+    "source_dir": "./App",
+    "build_dir": "./.tpv_build",
+    "compiler": {
+        "cmd": "llc",
+        "flags": [
+            "-filetype=obj",
+            "-relocation-model=pic"
+        ]
+    },
+    "linker": {
+        "cmd": "clang++",
+        "flags": [
+            "-Wl,--allow-multiple-definition",
+            "-lmsvcrt",
+            "-lucrt",
+            "-lpthread",
+            "-lmingwex",
+            "-lkernel32",
+            "-luser32"
+        ],
+        "output": "GenericTest4.exe"
+    },
+    "includes": [
+        "../../includes"
+    ],
+    "target": {
+        "triple": "x86_64-pc-windows-gnu",
+        "datalayout": "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+    },
+    "options": {
+        "slice_level": 3,
+        "sha1_slice_level": 1,
+        "target": "llvm",
+        "strict_mode": true
+    }
+}