Add demo.gif, update README, and fix ClinicalTrials URL encoding

Author: interestng

README.md

@@ -6,7 +6,7 @@
 
 MedKit is a high-performance, unified SDK that transforms fragmented medical data APIs into a single, programmable platform. It provides a clean interface for **OpenFDA**, **PubMed**, and **ClinicalTrials.gov**, augmented with a clinical intelligence layer and relationship mapping.
 
-![MedKit CLI Demo](docs/images/cli_demo.png)
+![MedKit CLI Demo](demo.gif)
 
 ## ✨ Quick Example
 

demo.gif

@@ -0,0 +1,8 @@
+Output demo.gif
+Set FontSize 32
+Set Width 1200
+Set Height 600
+Type "medkit status"
+Sleep 500ms
+Enter
+Sleep 5s

demo.tape

@@ -1,4 +1,5 @@
 import json
+import urllib.parse
 import urllib.request
 from typing import Any
 
@@ -24,7 +25,8 @@ def capabilities(self) -> list[str]:
         return ["trials"]
 
     def get_sync(self, item_id: str) -> ClinicalTrial:
-        url = f"{self.BASE_URL}/{item_id}"
+        encoded_id = urllib.parse.quote(item_id)
+        url = f"{self.BASE_URL}/{encoded_id}"
         try:
             req = urllib.request.Request(url, headers=self._get_headers())
             with urllib.request.urlopen(req) as response:
@@ -68,7 +70,8 @@ def _get_headers(self) -> dict[str, str]:
     def search_sync(self, query: str, **kwargs) -> list[ClinicalTrial]:
         limit = kwargs.get("limit", 10)
         recruiting = kwargs.get("recruiting")
-        url = f"{self.BASE_URL}?query.cond={query}&pageSize={limit}"
+        encoded_query = urllib.parse.quote(query)
+        url = f"{self.BASE_URL}?query.cond={encoded_query}&pageSize={limit}"
         try:
             req = urllib.request.Request(url, headers=self._get_headers())
             with urllib.request.urlopen(req) as response: