Add multilingual Agila learning examples and Git practice guide

en/ai-tests-and-debugging/README.md

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+# A small bug report with reproducible evidence
+
+Turn the threshold defect into a concise bug report and repair. Include independent expected results, a regression test, and a clearly stated limit.
+
+- State a requirement and derive expectations before running.
+- Show the smallest input that reveals the original mismatch.
+- Demonstrate that the test fails for the defect and passes after the repair.
+- Record the assertion policy and compiler command.
+- Explain one untested requirement and propose the next relevant case.

en/ai-tests-and-debugging/main.adb

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+pragma Assertion_Policy (Check);
+with Ada.Text_IO;
+
+procedure Main is
+   function Passed (Score : Integer) return Boolean is
+   begin
+      return Score >= 70;
+   end Passed;
+begin
+   pragma Assert (not Passed (69));
+   pragma Assert (Passed (70));
+   pragma Assert (Passed (71));
+   Ada.Text_IO.Put_Line ("Threshold checks passed");
+end Main;