refactor custom-select/auto-complete context (#830)

skyvern/forge/prompts/skyvern/parse-input-or-select-context.j2

@@ -0,0 +1,21 @@
+You are a browser agent performing actions on the web. You are instructed to take an INPUT or SELECT action on the element(id: "{{ element_id }}"). Extract some detailed information from the context/reasoning, and double-check the information by analysing the HTML elements.
+
+MAKE SURE YOU OUTPUT VALID JSON. No text before or after JSON, no trailing commas, no comments (//), no unnecessary quotes, etc.
+
+Reply in the following JSON format:
+{
+    "thought": str, // A string to describe how you double-check the information to ensure the accuracy.
+    "field": str, // Which field is this action intended to fill out?
+    "is_required": bool, // True if this is a required field, otherwise false.
+}
+
+Existing reasoning context:
+```
+{{ action_reasoning }}
+```
+
+HTML elements:
+```
+{{ elements }}
+```
+