Implement Minesweeper Click-to-Reveal Expansion

Implement a text-based Minesweeper engine. The engine should handle board initialization and the "click" operation.

Board Setup:

• The board has a specified height and width.
• Some cells contain mines.
• Each non-mine cell must store the count of adjacent mines (considering 8-directional neighbors).

Click Behavior (click(r, c)):

1. If the clicked cell (r, c) contains a mine, reveal it and end the game.
2. Otherwise, reveal the clicked cell (r, c).
3. If the revealed cell's adjacent-mine count is 0, recursively or iteratively reveal all connected cells with a count of 0, and their immediate non-zero-count neighbors (standard Minesweeper expansion).
4. Re-clicking an already revealed cell should have no effect.

I/O / Interaction:

• Provide functions or classes to allow a user to play by making repeated clicks.
• The board state can be visualized using print, showing hidden cells as #, revealed numbers as 0-8, and mines as * only when revealed.

Constraints:

• 1 ≤ width, height ≤ 200 (total cells up to 40,000).
• Mines can constitute up to width*height - 1 of the cells.
• The expansion logic must avoid stack overflow issues on large boards.

Deliverables:

• Appropriate data structures for representing the board state.
• An efficient implementation for the click expansion logic.
• A simple demonstration loop showing the board's state after each click.