Support Indexing Images via OCR (#823)

- Added support for uploading .jpeg, .jpg, and .png files to Khoj from Web, Desktop app
- Updating indexer to generate raw text and entries using RapidOCR
- Details
  * added support for indexing images via ocr
  * fixed pyproject.toml
  * Update src/khoj/processor/content/images/image_to_entries.py
     Co-authored-by: Debanjum <debanjum@gmail.com>
  * Update src/khoj/processor/content/images/image_to_entries.py
     Co-authored-by: Debanjum <debanjum@gmail.com>
  * removed redudant try except blocks
  * updated desktop js file to support image formats
  * added tests for jpg and png
  * Fix processing for image to entries files
  * Update unit tests with working image indexer
  * Change png test from version verificaition to open-cv verification

---------

Co-authored-by: Debanjum <debanjum@gmail.com>
Co-authored-by: sabaimran <narmiabas@gmail.com>

src/interface/desktop/main.js

@@ -19,7 +19,7 @@ const textFileTypes = [
     'org', 'md', 'markdown', 'txt', 'html', 'xml',
     // Other valid text file extensions from https://google.github.io/magika/model/config.json
     'appleplist', 'asm', 'asp', 'batch', 'c', 'cs', 'css', 'csv', 'eml', 'go', 'html', 'ini', 'internetshortcut', 'java', 'javascript', 'json', 'latex', 'lisp', 'makefile', 'markdown', 'mht', 'mum', 'pem', 'perl', 'php', 'powershell', 'python', 'rdf', 'rst', 'rtf', 'ruby', 'rust', 'scala', 'shell', 'smali', 'sql', 'svg', 'symlinktext', 'txt', 'vba', 'winregistry', 'xml', 'yaml']
-const binaryFileTypes = ['pdf']
+const binaryFileTypes = ['pdf', 'jpg', 'jpeg', 'png']
 const validFileTypes = textFileTypes.concat(binaryFileTypes);
 
 const schema = {