[Multi-User Part 6]: Address small bugs and upstream PR comments (#518)

- 08654163cb227edb8991ad7f77c99b560819f4f9: Add better parsing for XML files
- f3acfac7fbec0a3876e7586607c376c9dfac6a4d: Add a try/catch around the dateparser in order to avoid internal server errors in app
- 7d43cd62c0d51889978413ca411cec1bd37b024a: Chunk embeddings generation in order to avoid large memory load
- e02d751eb3cb9a005f1b529fde3b34ce3c026f1b: Addresses comments from PR #498 
- a3f393edb49842bedb4f42fba2dfc831ee51db7f: Addresses comments from PR #503 
- 66eb0782867b201a878c7fb13ba662be1258037c: Addresses comments from PR #511 
- Address various items in https://github.com/khoj-ai/khoj/issues/527

src/interface/desktop/renderer.js

@@ -174,6 +174,7 @@ urlInput.addEventListener('blur', async () => {
         new URL(urlInputValue);
     } catch (e) {
         console.log(e);
+        alert('Please enter a valid URL');
         return;
     }