Return value of search_type in /config/type API endpoint

- Remove need for interfaces to downcase content types returned by API
  before using the type in search and other API endpoint
- Fix to check for search_type.name in plugin keys instead of value

src/interface/emacs/khoj.el

@@ -281,7 +281,6 @@ Use `which-key` if available, else display simple message in echo area"
       (url-insert-file-contents config-url)
       (thread-last
         (json-parse-buffer :object-type 'alist)
-        (mapcar 'downcase)
         (mapcar 'intern)))))
 
 (defun khoj--construct-api-query (query content-type &optional rerank)

src/khoj/interface/web/index.html

@@ -65,7 +65,7 @@
         function search(rerank=false) {
             // Extract required fields for search from form
             query = document.getElementById("query").value.trim();
-            type = document.getElementById("type").value.toLowerCase();
+            type = document.getElementById("type").value;
             results_count = document.getElementById("results-count").value || 6;
             console.log(`Query: ${query}, Type: ${type}`);
 

src/khoj/routers/api.py

@@ -30,10 +30,10 @@ def get_default_config_data():
 def get_config_types():
     """Get configured content types"""
     return [
-        search_type.name
+        search_type.value
         for search_type in SearchType
         if any(search_type.value == configured_content_type[0] for configured_content_type in state.config.content_type)
-        or search_type.value in state.config.content_type.plugins.keys()
+        or search_type.name in state.config.content_type.plugins.keys()
     ]