Add multilingual Agila learning examples and Git practice guide

en/ai-explain-before-run/README.md

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+# A review of an AI-style threshold draft
+
+Review and repair the deliberately flawed threshold function. Present your reasoning so you can verify it without the conversation that produced the draft.
+
+- Restate the at-least-70 requirement in your own words.
+- Trace 69, 70, and 71 before execution.
+- Show the incorrect and corrected comparisons with actual results.
+- Explain input type, Boolean result, and the output call.
+- Record AI assistance and answer one new boundary example you predict and test.

en/ai-explain-before-run/main.adb

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+with Ada.Text_IO;
+
+procedure Main is
+   function Passed (Score : Integer) return Boolean is
+   begin
+      return Score > 70; -- Deliberate candidate to review
+   end Passed;
+begin
+   Ada.Text_IO.Put_Line (Boolean'Image (Passed (70)));
+end Main;