Connect clipboard functionality to their keybindings (microsoft#1093)

* Connects clipboard functionality to their keybindings.

* Cleaning up comments and whitespace.

* Added "copyTextWithoutNewlines" keybinding.

* Fixing tabs in idl file

* Fixing merge conflicts

* Adding default keybindings for copy and paste to ctrl-shift-c and ctrl-shift-v, respectively.

* Complying with refactoring

* Fixing formatting issues

src/cascadia/TerminalApp/App.cpp

@@ -503,6 +503,8 @@ namespace winrt::TerminalApp::implementation
         bindings.ScrollDownPage([this]() { _ScrollPage(1); });
         bindings.SwitchToTab([this](const auto index) { _SelectTab({ index }); });
         bindings.OpenSettings([this]() { _OpenSettings(); });
+        bindings.CopyText([this](const auto trimWhitespace) { _CopyText(trimWhitespace); });
+        bindings.PasteText([this]() { _PasteText(); });
     }
 
     // Method Description:
@@ -1015,6 +1017,14 @@ namespace winrt::TerminalApp::implementation
         control.CopySelectionToClipboard(trimTrailingWhitespace);
     }
 
+    // Method Description:
+    // - Paste text from the Windows Clipboard to the focused terminal
+    void App::_PasteText()
+    {
+        const auto control = _GetFocusedControl();
+        control.PasteTextFromClipboard();
+    }
+
     // Method Description:
     // - Sets focus to the tab to the right or left the currently selected tab.
     void App::_SelectNextTab(const bool bMoveRight)