Move JSON generation template to an external file with a placeholder

examples/example_03.json

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+{
+    "topic": "wireless machine communication"
+}

langchain_templates/text_to_json_template.txt

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+Convert the given slide deck text into structured JSON output.
+Also, generate and add an engaging presentation title.
+The output should be only correct and valid JSON having the following structure:
+
+{
+    "title": "...",
+    "slides": [
+        {
+            "heading": "...",
+            "bullet_points": [
+                "...",
+                [
+                    "...",
+                    "..."
+                ]
+            ]
+        },
+        {
+            ...
+        },
+    ]
+}
+
+
+===
+Text:
+
+<REPLACE_PLACEHOLDER>
+===
+
+In the output JSON, the `heading` field should contain the heading of each slide,
+Each slide object has a `bullet_points` array containing the slide's contents. 
+The `bullet_points` array can contain strings or array of strings.
+The sub-bullets for each slide from the input text should appear as an array of strings inside `bullet_points`.
+The `bullet_points` field must not contain any object.
+The output JSON must contain everything from the input text, do not lose anything.
+
+Output:
+```json