Igniters-Week3Day5: Cybersecurity Analyst And Alex

[ebenhays]

Added these UI enhancement:

1. Direct Code Paste: The textarea is now editable and users can type or paste Python code directly without uploading a file. Also, a "Clear" button appears whenever there's content, resetting everything
2. Export / Download Results: The results of the analysis can now be downloaded into JSON or Markdown
3. Severity Filtering: A dropdown filter (All / Critical / High / Medium / Low) sits next to the download buttons
4. Real-Time Progress via SSE : Implemented SSE(Server Side Events). A 15-second heartbeat keeps the connection alive during the long Semgrep scan

[ebenhays]

@iamumarjaved Please review

[iamumarjaved]

Great @ebenhays

@ed-donner This is ready to be merged.