Add 2 additional error messages (#18462)

Add additional information to 2 error scenarios when launching a
different profile in the `ConptyConnection.cpp` file.
  - Requires Elevation
  - File Not Found

Created a profile that required elevation and verified the error
message. Created profile that passed a made up command and verified the
error message.

Closes #7186

Author: halldk

.github/actions/spelling/allow/allow.txt

@@ -11,6 +11,7 @@ colorbrewer
 commandlines
 consvc
 copyable
+CText
 dalet
 dcs
 deselection

src/cascadia/TerminalConnection/ConptyConnection.cpp

@@ -428,6 +428,20 @@ namespace winrt::Microsoft::Terminal::TerminalConnection::implementation
             TerminalOutput.raise(L"\r\n");
             TerminalOutput.raise(badPathText);
         }
+        // If the requested action requires elevation, display appropriate message
+        else if (hr == HRESULT_FROM_WIN32(ERROR_ELEVATION_REQUIRED))
+        {
+            const auto elevationText = RS_(L"ElevationRequired");
+            TerminalOutput.raise(L"\r\n");
+            TerminalOutput.raise(elevationText);
+        }
+        // If the requested executable was not found, display appropriate message
+        else if (hr == HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND))
+        {
+            const auto fileNotFoundText = RS_(L"FileNotFound");
+            TerminalOutput.raise(L"\r\n");
+            TerminalOutput.raise(fileNotFoundText);
+        }
 
         _transitionToState(ConnectionState::Failed);
 

src/cascadia/TerminalConnection/Resources/en-US/Resources.resw

@@ -209,7 +209,7 @@
   </data>
   <data name="CtrlDToClose" xml:space="preserve">
     <value>You can now close this terminal with Ctrl+D, or press Enter to restart.</value>
-	  <comment>"Ctrl+D" and "Enter" represent keys the user will press (control+D and Enter).</comment>
+    <comment>"Ctrl+D" and "Enter" represent keys the user will press (control+D and Enter).</comment>
   </data>
   <data name="ProcessFailedToLaunch" xml:space="preserve">
     <value>[error {0} when launching `{1}']</value>
@@ -220,4 +220,10 @@
     <value>Could not access starting directory "{0}"</value>
     <comment>The first argument {0} is a path to a directory on the filesystem, as provided by the user.</comment>
   </data>
-</root>
+  <data name="ElevationRequired" xml:space="preserve">
+    <value>The requested operation requires elevation.</value>
+  </data>
+  <data name="FileNotFound" xml:space="preserve">
+    <value>The system cannot find the file specified.</value>
+  </data>
+</root>