put standard library file associations in package.json (#14002)

Author: bobbrow

Extension/package.json

@@ -64,6 +64,134 @@
     ],
     "main": "./dist/src/main",
     "contributes": {
+        "languages": [
+            {
+                "id": "cpp",
+                "filenames": [
+                    "algorithm",
+                    "any",
+                    "array",
+                    "atomic",
+                    "barrier",
+                    "bit",
+                    "bitset",
+                    "cassert",
+                    "ccomplex",
+                    "cctype",
+                    "cerrno",
+                    "cfenv",
+                    "cfloat",
+                    "charconv",
+                    "chrono",
+                    "cinttypes",
+                    "ciso646",
+                    "climits",
+                    "clocale",
+                    "cmath",
+                    "codecvt",
+                    "compare",
+                    "complex",
+                    "concepts",
+                    "condition_variable",
+                    "contracts",
+                    "coroutine",
+                    "csetjmp",
+                    "csignal",
+                    "cstdalign",
+                    "cstdarg",
+                    "cstdbool",
+                    "cstddef",
+                    "cstdint",
+                    "cstdio",
+                    "cstdlib",
+                    "cstring",
+                    "ctgmath",
+                    "ctime",
+                    "cuchar",
+                    "cwchar",
+                    "cwctype",
+                    "debugging",
+                    "deque",
+                    "exception",
+                    "execution",
+                    "expected",
+                    "filesystem",
+                    "flat_map",
+                    "flat_set",
+                    "format",
+                    "forward_list",
+                    "fstream",
+                    "functional",
+                    "future",
+                    "generator",
+                    "hazard_pointer",
+                    "hive",
+                    "initializer_list",
+                    "inplace_vector",
+                    "iomanip",
+                    "ios",
+                    "iosfwd",
+                    "iostream",
+                    "istream",
+                    "iterator",
+                    "latch",
+                    "limits",
+                    "linalg",
+                    "list",
+                    "locale",
+                    "map",
+                    "mdspan",
+                    "memory",
+                    "memory_resource",
+                    "mutex",
+                    "new",
+                    "numbers",
+                    "numeric",
+                    "optional",
+                    "ostream",
+                    "print",
+                    "queue",
+                    "random",
+                    "ranges",
+                    "ratio",
+                    "rcu",
+                    "regex",
+                    "scoped_allocator",
+                    "semaphore",
+                    "set",
+                    "shared_mutex",
+                    "simd",
+                    "source_location",
+                    "span",
+                    "spanstream",
+                    "sstream",
+                    "stack",
+                    "stacktrace",
+                    "stdexcept",
+                    "stdfloat",
+                    "stop_token",
+                    "streambuf",
+                    "string",
+                    "string_view",
+                    "strstream",
+                    "syncstream",
+                    "system_error",
+                    "text_encoding",
+                    "thread",
+                    "tuple",
+                    "type_traits",
+                    "typeindex",
+                    "typeinfo",
+                    "unordered_map",
+                    "unordered_set",
+                    "utility",
+                    "valarray",
+                    "variant",
+                    "vector",
+                    "version"
+                ]
+            }
+        ],
         "walkthroughs": [
             {
                 "id": "cppWelcome",
@@ -3349,7 +3477,7 @@
                     },
                     "C_Cpp.autoAddFileAssociations": {
                         "type": "boolean",
-                        "default": true,
+                        "default": false,
                         "markdownDescription": "%c_cpp.configuration.autoAddFileAssociations.markdownDescription%",
                         "scope": "window"
                     },