fix: support HTTP URLs in getTitle() for title fetching

[malladinagarjuna2]

Fixes #20

Problem

getTitle() only used https.get(), so neu appify http://localhost:3333 (and any HTTP URL) failed with:

Users had to pass --title for HTTP URLs.

Solution

• Parse the URL with the built-in URL constructor and choose the request module by protocol.
• Use http for http: and https for https: when fetching the page to extract the <title>.
• Reject with clear errors for invalid URLs and unsupported protocols (e.g. file:).
• Use reject(err) instead of reject('') in getTitle() so callers get a proper error.

Changes

• index.js: Added http and url modules; in getTitle(), select http or https from new URL(url).protocol and call protocol.get(url, ...). Exported getTitle for tests.
• package.json: Added test:getTitle script.

Testing

• npm run test:getTitle (HTTP + invalid protocol; HTTPS optional if network available).
• Manually: npx serve sample-website -p 3333 then neu appify http://localhost:3333 — app is created with the page title.