feat: add tty/dectest/venv

crates/erg_compiler/lib/pystd/doctest.d.er

@@ -0,0 +1,13 @@
+.TestResults: ClassType
+.TestResults.
+    attempted: Nat
+    count: Nat
+    failed: Nat
+    index: Nat
+
+.testfile!: (
+    filename := PathLike,
+) => .TestResults
+.testmod!: (
+    m := GenericModule,
+) => NoneType

crates/erg_compiler/lib/pystd/tty.d.er

@@ -0,0 +1,2 @@
+.setraw!: (fd: FileLike or Nat, when := Nat) => NoneType
+.setcbreak!: (fd: FileLike or Nat, when := Nat) => NoneType

crates/erg_compiler/lib/pystd/venv.d/__init__.d.er

@@ -0,0 +1,24 @@
+
+.EnvBuilder!: ClassType
+.EnvBuilder!.
+    __call__: (
+        system_site_packages := Bool,
+        clear := Bool,
+        symlinks := Bool,
+        upgrade := Bool,
+        with_pip := Bool,
+        prompt := Str,
+        upgrade_deps := Bool,
+    ) -> .EnvBuilder!
+    create!: (self: .EnvBuilder!, env_dir: PathLike) => NoneType
+
+.create!: (
+    env_dir: PathLike,
+    system_site_packages := Bool,
+    clear := Bool,
+    symlinks := Bool,
+    upgrade := Bool,
+    with_pip := Bool,
+    prompt := Str,
+    upgrade_deps := Bool
+) => NoneType