add data tables comment to scheduled poll templates (#8221)

Add a comment to each scheduled poll template (Python, Deno, Bun, Go)
mentioning that data tables can be used for more complex states, with
a link to the documentation.

Closes #8220

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>
Co-authored-by: windmill-internal-app[bot] <windmill-internal-app[bot]@users.noreply.github.com>

frontend/src/lib/script_helpers.ts

@@ -30,6 +30,9 @@ def main():
     # wmill.setState(newState)
     # 4. Return the new rows
     # return range from (state to newState)
+    #
+    # For more complex states, consider using Data Tables:
+    # https://www.windmill.dev/docs/core_concepts/persistent_storage/data_tables
     return [1, 2, 3]`
 
 const PYTHON_INIT_CODE = `import os
@@ -554,6 +557,9 @@ export async function main() {
   // await wmill.setState(newState)
   // 4. Return the new rows
   // return range from (state to newState)
+  //
+  // For more complex states, consider using Data Tables:
+  // https://www.windmill.dev/docs/core_concepts/persistent_storage/data_tables
 
   return [1,2,3]
 
@@ -575,6 +581,9 @@ export async function main() {
   // await wmill.setState(newState)
   // 4. Return the new rows
   // return range from (state to newState)
+  //
+  // For more complex states, consider using Data Tables:
+  // https://www.windmill.dev/docs/core_concepts/persistent_storage/data_tables
 
   return [1,2,3]
 
@@ -599,6 +608,9 @@ func main() (interface{}, error) {
 	// 3. Compare the two states and update the internal state
 	wmill.SetState(4)
 	// 4. Return the new rows
+	//
+	// For more complex states, consider using Data Tables:
+	// https://www.windmill.dev/docs/core_concepts/persistent_storage/data_tables
 
 	return state, nil