Add GridPuzzle Sudoku Solver Chrome Extension

[google-labs-jules]

This PR introduces a Chrome extension designed to solve Sudoku puzzles on gridpuzzle.com, specifically targeting the "Evil Sudoku" page but working on others as well.

The extension works by:

1. Injecting a "Solve" button into the page header.
2. Scraping the grid state from the DOM, respecting data-readonly attributes to identify initial clues.
3. Solving the puzzle using a JavaScript-based backtracking algorithm (client-side, no external dependencies).
4. Simulating user interaction (clicks and keyboard events) to fill in the calculated solution.

The implementation is contained entirely within ChromeExtensions/GridPuzzleSudoku/.

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PR created automatically by Jules for task 2302771799547852570 started by @newtomsoft

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[github-actions]

Qodana Community for Python

125 new problems were found

Inspection name	Severity	Problems
Missing await syntax in coroutine calls	🔶 Warning	36
Redeclared names without usages	🔶 Warning	20
Unused imports	🔶 Warning	19
Invalid type hints definitions and usages	🔶 Warning	8
Unbound local variables	🔶 Warning	5
Unused local symbols	◽️ Notice	19
Shadowing names from outer scopes	◽️ Notice	8
Method is not declared static	◽️ Notice	5
An instance attribute is defined outside init``	◽️ Notice	2
Unclear exception clauses	◽️ Notice	2
Invalid abstract class definition and usages	◽️ Notice	1

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[newtomsoft]

can you call python solver ?
if not, can you implement this solver in the chrome extension project with or-tools ?

[google-labs-jules]

can you call python solver ?
if not, can you implement this solver in the chrome extension project with or-tools ?

I have updated the implementation to call the Python solver. I added a Run/ExtensionServer.py (Flask) that exposes the SudokuSolver (which uses OR-Tools) via a local API. The Chrome extension now communicates with this local server to solve the puzzle.