Add type definitions for frida-gum (#35911)

* Add type definitions for frida-gum

Consumed through frida-compile, e.g. like this:

    https://github.com/oleavr/frida-agent-example

* Delete redundant declare keywords

types/frida-gum/frida-gum-tests.ts

@@ -0,0 +1,54 @@
+Frida.version; // $ExpectType string
+
+const otherPuts = new NativeCallback(() => {
+    return 0;
+}, "int", ["pointer"]);
+
+const puts = new NativeFunction(Module.getExportByName(null, "puts"), "int", ["pointer"]);
+
+// $ExpectType NativeFunction
+puts;
+
+const message = Memory.allocUtf8String("Hello!");
+
+// $ExpectType NativePointer
+message;
+
+// $ExpectType NativeReturnValue
+puts.call(otherPuts, message);
+
+// $ExpectType NativeReturnValue
+puts.apply(otherPuts, [message]);
+
+// $ExpectType NativeReturnValue
+puts(message);
+
+const open = new SystemFunction(Module.getExportByName(null, "open"), "int", ["pointer", "int"]);
+
+// $ExpectType SystemFunction
+open;
+
+const path = Memory.allocUtf8String("/etc/hosts");
+const result = open(path, 0) as UnixSystemFunctionResult;
+
+// $ExpectType NativeReturnValue
+result.value;
+
+// $ExpectType number
+result.errno;
+
+Interceptor.attach(puts, {
+    onEnter(args) {
+        // $ExpectType NativePointer[]
+        args;
+    },
+    onLeave(retval) {
+        // $ExpectType InvocationReturnValue
+        retval;
+    }
+});
+
+const obj = new ObjC.Object(ptr("0x42"));
+
+// $ExpectType Object
+obj;

types/frida-gum/tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "frida-gum-tests.ts"
+    ]
+}

types/frida-gum/tslint.json

@@ -0,0 +1,6 @@
+{
+    "extends": "dtslint/dt.json",
+    "rules": {
+        "no-const-enum": false
+    }
+}