feat: add screen text extractor script

[anshifmonz]

This PR adds a script that lets users select a region of the screen and extract text from it using OCR.
Once triggered, it grabs a screenshot, preprocesses it for clarity, runs Tesseract OCR, and copies the text to the clipboard.

Added

• dotfiles/.config/hypr/scripts/text-extractor.sh

Updated

• Setup scripts (Arch / Fedora / openSUSE) to install Tesseract language packs
• Global package list: added tesseract and wl-clipboard
• Docs: added new dependencies

How It Works (Implementation Details)

1. Launches hyprpicker to freeze screen
2. Uses slurp to select a screen region
3. Captures that region using grim
4. Pipes the image into ImageMagick for preprocessing:
   • grayscale
   • normalize
   • contrast stretch
   • sharpen
   • upscale 2×
5. Feeds the processed image into Tesseract (--psm 6)
6. Saves result to clipboard via wl-copy
7. Includes:
   • dependency checking
   • cleanup traps
   • timeout protection for slurp
   • safe kill for background picker

Usage

Bind to a key in Hyprland (default):

bind = $mainMod ALT, A, exec, $HYPRSCRIPTS/text-extractor.sh

Trigger → select area → extracted text is instantly in clipboard.