TechDraw: Replace annotation edit dialog with QPlainTextEdit (#20092)

* TechDraw: Replace annotation edit dialog with QPlainTextEdit

* Remove useless include introduced in previous commit

* Remove trailing _ for members to conform with rest of the codebase

* Add const & to string vectors that don't need copying

* Fix IWYU linter warnings

* Forward all annotation double clicks to the StringList property editor

* Remove unused dialog

* Fix Qt 5 build error

* Fix missing exports with MSVC

src/Mod/TechDraw/Gui/ViewProviderAnnotation.h

@@ -51,6 +51,9 @@ public:
     std::vector<App::DocumentObject*> claimChildren(void) const override;
 
     TechDraw::DrawViewAnnotation* getViewObject() const override;
+
+    bool doubleClicked() override;
+    bool setEdit(int ModNum) override;
 };
 
 }// namespace TechDrawGui