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。

VectorGenericTest/App/main.vp

@@ -0,0 +1,11 @@
+import t, c
+import testcheck
+import vectortest
+
+
+def main() -> t.CInt | t.CExport:
+    testcheck.begin("VectorGenericTest: Vector 泛型测试")
+    testcheck.section("Vector 泛型")
+    vectortest.vector_main()
+    testcheck.ok("Vector 泛型测试完成")
+    return testcheck.end()

VectorGenericTest/App/vectortest.vp

@@ -0,0 +1,43 @@
+import t, c
+from t import CInt, CPtr, CChar, CFloat64T
+import viperlib
+import stdlib
+import vector
+import memhub
+
+POOL_SIZE: t.CDefine = 4096
+
+def vector_main() -> CInt:
+    buf: str = stdlib.malloc(256)
+    pool_mem: t.CPtr = stdlib.malloc(POOL_SIZE)
+    pool: memhub.MemPool | CPtr = memhub.MemPool(pool_mem, POOL_SIZE)
+
+    vi: vector.Vector | CPtr = vector.Vector(pool, 10, CInt(0))
+    vi.push(CInt(10))
+    vi.push(CInt(20))
+    vi.push(CInt(30))
+    viperlib.snprintf(buf, 256, "Vector[int]: len=%d, [0]=%d, [1]=%d, [2]=%d", vi.len(), vi.get(0), vi.get(1), vi.get(2))
+    print(buf)
+
+    vi.set(1, CInt(99))
+    viperlib.snprintf(buf, 256, "Vector[int]: set[1]=99, [1]=%d", vi.get(1))
+    print(buf)
+
+    vi.clear()
+    viperlib.snprintf(buf, 256, "Vector[int]: cleared, len=%d", vi.len())
+    print(buf)
+
+    vi.free()
+
+    vd: vector.Vector | CPtr = vector.Vector(pool, 8, CFloat64T(0.0))
+    vd.push(CFloat64T(1.5))
+    vd.push(CFloat64T(2.7))
+    vd.push(CFloat64T(3.14))
+    viperlib.snprintf(buf, 256, "Vector[double]: len=%d, [0]=%.1f, [1]=%.1f, [2]=%.2f", vd.len(), vd.get(0), vd.get(1), vd.get(2))
+    print(buf)
+
+    vd.free()
+
+    stdlib.free(pool_mem)
+    stdlib.free(buf)
+    return 0

VectorGenericTest/project.json

@@ -0,0 +1,40 @@
+{
+    "$schema": "https://raw.githubusercontent.com/TermiNexus/TransPyC/main/schemas/project-schema.json",
+    "name": "VectorGenericTest",
+    "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": "VectorGenericTest.exe"
+    },
+    "includes": [
+        "../../includes"
+    ],
+    "target": {
+        "triple": "x86_64-pc-windows-gnu",
+        "datalayout": "e-m:w-p270:32:32-p271:32:32-p272:64:64-f80:128-n8:16:32:64-S128"
+    },
+    "options": {
+        "slice_level": 3,
+        "sha1_slice_level": 1,
+        "target": "llvm",
+        "strict_mode": true
+    }
+}