Feat/implement minesweeper

.github/workflows/connect_four.yml

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+name: Connect Four CI
+
+on:
+  push:
+    branches: [main, develop]
+    paths:
+      - 'examples/connect_four/**'
+      - '.github/workflows/connect_four.yml'
+  pull_request:
+    branches: [main, develop]
+    paths:
+      - 'examples/connect_four/**'
+      - '.github/workflows/connect_four.yml'
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  ci:
+    name: CI
+    runs-on: macos-latest
+    defaults:
+      run:
+        working-directory: examples/connect_four
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: wasm32v1-none
+          components: rustfmt, clippy
+
+      - name: Cache dependencies
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: examples/connect_four
+
+      - name: Check formatting
+        run: cargo fmt --check
+
+      - name: Clippy
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+      - name: Build
+        run: cargo build
+
+      - name: Test
+        run: cargo test
+
+      - name: Install Stellar CLI
+        run: brew install stellar-cli
+
+      - name: Stellar contract build
+        run: stellar contract build

.github/workflows/minesweeper.yml

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+name: Minesweeper CI
+
+on:
+  push:
+    branches: [main, develop]
+    paths:
+      - 'examples/minesweeper/**'
+      - '.github/workflows/minesweeper.yml'
+  pull_request:
+    branches: [main, develop]
+    paths:
+      - 'examples/minesweeper/**'
+      - '.github/workflows/minesweeper.yml'
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  ci:
+    name: CI
+    runs-on: macos-latest
+    defaults:
+      run:
+        working-directory: examples/minesweeper
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: wasm32v1-none
+          components: rustfmt, clippy
+
+      - name: Cache dependencies
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: examples/minesweeper
+
+      - name: Check formatting
+        run: cargo fmt --check
+
+      - name: Clippy
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+      - name: Build
+        run: cargo build
+
+      - name: Test
+        run: cargo test
+
+      - name: Install Stellar CLI
+        run: brew install stellar-cli
+
+      - name: Stellar contract build
+        run: stellar contract build

examples/connect_four/Cargo.toml

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+[package]
+name = "connect_four"
+version = "0.1.0"
+edition = "2021"
+description = "Connect Four on-chain game using Cougr-Core ECS framework on Stellar Soroban"
+license = "MIT OR Apache-2.0"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[dependencies]
+soroban-sdk = "25.1.0"
+cougr-core = { path = "../../" }
+
+[dev-dependencies]
+soroban-sdk = { version = "25.1.0", features = ["testutils"] }
+
+[profile.release]
+opt-level = "z"
+overflow-checks = true
+debug = 0
+strip = "symbols"
+debug-assertions = false
+panic = "abort"
+codegen-units = 1
+lto = true
+
+[profile.release-with-logs]
+inherits = "release"
+debug-assertions = true