Move testing knowledge from community to microsoft layer

Relocates the six P1+P2 testing-domain articles (18 files: .md + .good.al + .bad.al each) from community/knowledge/testing/ to microsoft/knowledge/testing/ per maintainer request. Pure git-mv rename; no content or frontmatter changes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

microsoft/knowledge/testing/handlerfunctions-attribute-must-match-ui-path.bad.al

@@ -0,0 +1,32 @@
+codeunit 50407 "Test Handler Match Bad"
+{
+    Subtype = Test;
+
+    // The path raises a Confirm AND a Message, but only the Confirm handler
+    // is listed. The Message has no handler -> unhandled-UI runtime abort.
+    // The mirror mistake — listing a third handler the path never hits —
+    // instead fails with "handler function was not executed".
+    [Test]
+    [HandlerFunctions('ConfirmHandlerYes')]
+    procedure PostWithConfirmAndMessage()
+    begin
+        RunPostingThatConfirmsAndMessages();
+    end;
+
+    local procedure RunPostingThatConfirmsAndMessages()
+    begin
+        if Confirm('Post this document?', false) then
+            Message('Posting completed.');
+    end;
+
+    [ConfirmHandler]
+    procedure ConfirmHandlerYes(Question: Text; var Reply: Boolean)
+    begin
+        Reply := true;
+    end;
+
+    [MessageHandler]
+    procedure PostMessageHandler(Message: Text)
+    begin
+    end;
+}