add endpoint/logic for creating a taskv2-workflow from a prompt (#3352)

skyvern/forge/prompts/skyvern/conversational_ui_goal.j2

@@ -0,0 +1,14 @@
+Given the user goal, come up with a title for it, and a block label.
+
+MAKE SURE YOU OUTPUT VALID JSON. No text before or after JSON, no trailing commas, no comments (//), no unnecessary quotes, etc.
+
+Reply in JSON format with the following keys:
+{
+  "title": str, // A descriptive and informative title for the goal. Use no more than 5 words
+  "block_label": str, // A label for the block. Use 1 word only. Based off of the "title".
+}
+
+User goal:
+```
+{{ user_goal }}
+```