Add localizable help for workspace config arguments

Add localizable mscppls help strings for the workspace-neutral
configuration option and its deprecated LSP-named aliases.

Author: kuchungmsft

Extension/src/nativeStrings.json

@@ -797,5 +797,17 @@
     "quick_info_alignment": {
         "text": "**Alignment:** %s B",
         "hint": "Alignment of a C or C++ type in bytes. %s is the numeric alignment. Translate B to a count-invariant byte unit symbol or abbreviation. {Locked=\"**\"} {Locked=\"%s\"}"
+    },
+    "help_allow_missing_workspace_config": {
+        "text": "Allow the server to start even when the specified workspace config file does not exist.",
+        "hint": "Describes the --allow-missing-workspace-config command-line option."
+    },
+    "help_deprecated_lsp_config": {
+        "text": "Deprecated alias for --workspace-config.",
+        "hint": "{Locked=\"--workspace-config\"}"
+    },
+    "help_deprecated_allow_missing_lsp_config": {
+        "text": "Deprecated alias for --allow-missing-workspace-config.",
+        "hint": "{Locked=\"--allow-missing-workspace-config\"}"
     }
 }