add gh folder

.github/FUNDING.yml

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+custom:
+  - https://www.buymeacoffee.com/marvin.j97

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Browser [e.g. chrome, safari]
+ - Version [e.g. 22]
+
+**Smartphone (please complete the following information):**
+ - Device: [e.g. iPhone6]
+ - OS: [e.g. iOS8.1]
+ - Browser [e.g. stock browser, safari]
+ - Version [e.g. 22]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/test.yml

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+name: Tests
+
+on:
+  #  TODO: remove
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - "**"
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  test:
+    timeout-minutes: 20
+    strategy:
+      matrix:
+        rust_version:
+          - stable
+          - "1.74.0" # MSRV
+        os:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: ${{ matrix.rust_version }}
+      - name: Add rustfmt
+        run: rustup component add rustfmt
+      - name: Add clippy
+        run: rustup component add clippy
+      - name: Set up cargo cache
+        uses: Swatinem/rust-cache@v2
+        with:
+          prefix-key: ${{ runner.os }}-cargo
+          workspaces: >
+            . -> target
+            examples/kv -> target
+      - name: Build
+        run: cargo build -v
+      - name: Format
+        run: cargo fmt --all -- --check
+      - name: Clippy
+        run: cargo clippy
+      - name: Run tests
+        run: cargo test -v -- --nocapture
+        env:
+          RUST_LOG: debug
+      - name: Build & test LSM examples
+        run: node compile_examples.mjs
+  cross:
+    cancel-timeout-minutes: 20
+    name: cross
+    strategy:
+      matrix:
+        target:
+          - aarch64-unknown-linux-gnu
+          # - aarch64-linux-android
+          - aarch64-unknown-linux-musl
+          # - i686-linux-android
+          # - x86_64-linux-android
+          # - i686-unknown-linux-gnu
+          - powerpc64-unknown-linux-gnu
+          #- mips64-unknown-linux-gnuabi64
+          - riscv64gc-unknown-linux-gnu
+          #- x86_64-apple-darwin
+          #- aarch64-apple-darwin
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: cross build --target ${{ matrix.target }}
+        run: |
+          cargo install cross
+          cross build --target ${{ matrix.target }}
+