docs: move all documentation to docs/ directory

COMMIT_MESSAGE_SUGGESTION.txt

@@ -0,0 +1,23 @@
+docs: organize documentation into docs/ directory and translate README to English
+
+- Move all documentation files to docs/ directory
+- Create docs/README.md as documentation index
+- Update all internal links in documentation
+- Translate main README.md to English
+- Update documentation links in main README
+
+Files moved:
+- ARCHITECTURE_TESTING.md
+- CI_CD.md
+- CI_FIXES.md
+- GOFMT_FIX.md
+- LINTER_FIXES.md
+- README_TESTING_CI.md
+- TESTIFY_FIX.md
+- TESTING.md
+- TEST_SUMMARY.md
+- USER_SERVICE_README.md
+- COMMIT_MESSAGE.txt
+
+This improves project organization by keeping the root directory clean
+and making it easier to find and navigate documentation.