doc: add test generation instructions and update run.sh

Added documentation for test generation through Ollama, including new command-line arguments for `generate_tests.py` and updated `run.sh` script. Also added a new `gen` command to `run.sh` for generating tests via Ollama. This improves usability by providing clear instructions and automation for test generation.

tests/codegen/test2.json

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+{
+  "prompt": "Write a Python function that reverses a string.",
+  "expected": "def reverse_string(s):\n    return s[::-1]"
+}

tests/codegen/test3.json

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+{
+  "prompt": "Here's a simple Python programming task:\n\n**Task:** Write a Python function that checks if a given string is a palindrome or not. A palindrome is a word, phrase, number, or other sequences of characters that reads the same forward and backward (ignoring spaces, punctuation, and capitalization).\n\n**Function Signature:**\n```python\ndef is_palindrome(s: str) -> bool:\n    \"\"\"\n    Check if the given string `s` is a palindrome.\n\n    Args:\n        s (str): The input string to check.\n\n    Returns:\n        bool: True if `s` is a palindrome, False otherwise.\n    \"\"\"\n```\n\n**Example:**\n\n```python\nassert is_palindrome(\"racecar\") == True\nassert is_palindrome(\"hello\") == False\nassert is_palindrome(\"A man, a plan, a canal: Panama\") == True  # Ignoring spaces and punctuation\n```\n\n**Hint:** You can use the `str.lower()` method to convert the string to lowercase and the `re` module to remove non-alphanumeric characters.",
+  "expected": "```python\nimport re\n\ndef is_palindrome(s: str) -> bool:\n    \"\"\"\n    Check if the given string `s` is a palindrome.\n\n    Args:\n        s (str): The input string to check.\n\n    Returns:\n        bool: True if `s` is a palindrome, False otherwise.\n    \"\"\"\n    cleaned = re.sub(r'\\W+', '', s.lower())\n    return cleaned == cleaned[::-1]\n```"
+}

tests/summarization/test2.json

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+{
+  "prompt": "Summarize the following text in 1-2 sentences: 'The quick brown fox jumps over the lazy dog. The dog, surprised by the fox's agility, barks loudly. The fox continues running without looking back.'",
+  "expected": "A quick fox jumps over a lazy dog, surprising it. The fox keeps running while the dog barks."
+}

tests/summarization/test3.json

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+{
+  "prompt": "Summarize the following text in 1-2 sentences: 'In the realm of programming, machine learning algorithms enable computers to improve their performance on a specific task without being explicitly programmed for each step. These algorithms learn from data, allowing them to identify patterns and make predictions or decisions with increasing accuracy over time. For instance, deep learning models, which are part of artificial intelligence, use neural networks to process vast amounts of information, making significant advancements in areas such as image recognition and natural language processing. As technology advances, these capabilities are being integrated into various sectors, from healthcare to autonomous vehicles, transforming the way we interact with digital systems and enhancing our understanding of complex data sets.'",
+  "expected": "Machine learning algorithms allow computers to improve their performance on specific tasks through data-driven pattern recognition, leading to advancements in areas like image recognition and natural language processing, and being increasingly integrated into sectors such as healthcare and autonomous vehicles."
+}

tests/translation/test3.json

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+{
+  "prompt": "Translate the following English text to Russian: 'What time is it right now?'",
+  "expected": "Который сейчас час?"
+}

tests/translation/test4.json

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+{
+  "prompt": "Translate the following English text to Russian: 'What time is it right now?'",
+  "expected": "Который сейчас час?"
+}

tests/translation/test5.json

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+{
+  "prompt": "Translate the following English text to Russian: '\"The sun is shining brightly.\"'",
+  "expected": "Солнце светит ярко."
+}