Add OCR dependency support to plugin installer

Adds new flags `--drawj2d-jar` and `--install-deps` to handle OCR dependencies
Automatically checks for required tools (unzip, Java, drawj2d.jar)
Installs missing system packages when `--install-deps` is used
Updates documentation with OCR setup examples

The implementation includes dependency checking that can be skipped with `--skip-deps`
when OCR functionality is not needed. The installer now copies and configures
drawj2d.jar if provided, and updates the plugin's data.json accordingly.

IMPLEMENTATION.md

@@ -273,6 +273,10 @@ npm run install-plugin -- --vault /path/to/vault
 
 # Exact target directory also works
 npm run install-plugin -- --plugin-dir /path/to/vault/.obsidian/plugins/obsidian-remarkable
+
+# OCR dependency setup
+npm run install-plugin -- --vault /path/to/vault --drawj2d-jar /path/to/drawj2d.jar
+npm run install-plugin -- --vault /path/to/vault --install-deps
 ```
 
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