deps/vm: vendor regress 0.11.1 补 Script/Script_Extensions 的 Unknown(Zzzz) 取值——上游表缺未分配码点集取值，规范合法模式 \p{Script=Unknown} 编译期 SyntaxError；fork 纯增量（0 行改动上游行，仅补区间表与解析臂），回归钉四则（未分配匹配/已分配不匹配/sc·scx·Zzzz 别名/既有取值不扰动）

third_party/regress/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "regress"
+version = "0.11.1"
+authors = ["ridiculousfish <corydoras@ridiculousfish.com>"]
+description = "A regular expression engine targeting EcmaScript syntax"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/ridiculousfish/regress"
+keywords = ["regex", "regexp"]
+edition = "2024"
+readme = "README.md"
+
+[features]
+default = ["backend-pikevm", "std"]
+
+std = ["memchr/std"]
+
+# Enables the PikeVM backend.
+backend-pikevm = []
+
+# Prefers indexes to pointers for bytecode IP and string positions, for the paranoid.
+index-positions = []
+
+# Prohibits all uses of unsafe code, for the paranoid.
+prohibit-unsafe = []
+
+# Enables UTF-16 support. This disables some optimizations, so it should only be used when necessary.
+utf16 = []
+
+# Enables Pattern trait implementation for str::find, str::contains, etc.
+pattern = []
+
+[dependencies]
+hashbrown = "0.16.0"
+memchr = { version = "2.4.0", default-features = false }