Move test runs into the test-run folder, add TimestampStrings, add basic tests via pytest

pytest added for dev.
Move all the test run python scripts into the "test-run" folder, so we can use the tests/ folder for just tests.

Setup one test for the TimestampStrings class with pytests in tests/unit/string_handling/test_timestamp_strings.py

test-run/double_byte_string_format/double_byte_string_format.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env -S uv run --script
+
+"""
+Test for double byte format
+"""
+
+from corelibs.string_handling.double_byte_string_format import DoubleByteFormatString
+
+
+def main():
+    """
+    Main call
+    """
+    string = [
+        "Some string 123 other text",
+        "Some string 日本語 other text",
+        "日本語は string 123 other text",
+        "あいうえおかきくけこさしすせそなにぬねのまみむめも〜",
+        "あいうえおかきくけこさしす 1 other text",
+        "Some string すせそなにぬねのまみむめも〜",
+        "SOME OTHER STRING THAT IS LONGER THAN TWENTYSIX CHARACTERS",
+        "日本語は string 123 other text Some string 日本語 other text"
+    ]
+
+    format_str = "{{:<{len}}}"
+
+    length_set = [
+        (26, 25),
+        (26, 26),
+        (26, 60),
+        (26, 20),
+        (26, -5),
+        (-6, -5),
+    ]
+
+    for _length_set in length_set:
+        cut_length = _length_set[0]
+        format_length = _length_set[1]
+        print(f"========= Cut: {cut_length} | Format: {format_length} ==> ")
+        for _string in string:
+            string_test = DoubleByteFormatString(_string, cut_length, format_length)
+            formated = format_str.format(
+                len=string_test.get_format_length()
+            ).format(
+                string_test.get_string_short()
+            )
+
+            print(
+                "* Shorten string: shorten length: "
+                f"Req: {string_test.get_requested_cut_length()} ({cut_length}) / "
+                f"Set: {string_test.get_cut_length()}, "
+                "format length: "
+                f"Req: {string_test.get_requested_format_length()} ({format_length}) / "
+                f"Set: {string_test.get_format_length()}"
+                f"\nOrig: |{_string}|"
+                f"\nGSS : |{string_test.get_string_short()}|"
+                f"\nF   : |{formated}|"
+                f"\nGSSF: |{string_test.get_string_short_formated()}|"
+            )
+            print("-------")
+
+
+if __name__ == "__main__":
+    main()
+
+# __END__