feat: add installation script for Clipper (#10)

This commit adds a shell script to easily install Clipper on Linux and macOS systems. The script determines the OS and architecture, downloads the appropriate binary from the GitHub releases, makes it executable, and installs it to /usr/local/bin. It also verifies the installation and provides informative logging messages throughout the process.

- Supports installation on Linux (x86_64, arm64) and macOS (x86_64, arm64).
- Uses mktemp to create a temporary directory for downloading the binary.
- Ensures the /usr/local/bin directory is available and in the user's PATH before installation.
- Provides clear error messages and feedback during each step of the installation process.

install.sh

@@ -0,0 +1,102 @@
+#!/bin/sh
+
+# Clipper version to install
+VERSION="1.3.0"
+
+# Determine OS and Architecture
+OS=$(uname -s)
+ARCH=$(uname -m)
+
+# Create a temporary directory for downloading the binary
+TMP_DIR=$(mktemp -d)
+TMP_BINARY="$TMP_DIR/clipper"
+
+# Function to set the download URL based on OS and Architecture
+set_binary_url() {
+    case "$OS" in
+    "Linux")
+        case "$ARCH" in
+        "x86_64")
+            BINARY_URL="https://github.com/supitsdu/clipper/releases/download/v$VERSION/clipper_linux_amd64_v$VERSION"
+            ;;
+        "aarch64" | "arm64")
+            BINARY_URL="https://github.com/supitsdu/clipper/releases/download/v$VERSION/clipper_linux_arm64_v$VERSION"
+            ;;
+        *)
+            echo "Error: Unsupported architecture: $ARCH"
+            exit 1
+            ;;
+        esac
+        ;;
+    "Darwin")
+        case "$ARCH" in
+        "x86_64")
+            BINARY_URL="https://github.com/supitsdu/clipper/releases/download/v$VERSION/clipper_darwin_amd64_v$VERSION"
+            ;;
+        "arm64")
+            BINARY_URL="https://github.com/supitsdu/clipper/releases/download/v$VERSION/clipper_darwin_arm64_v$VERSION"
+            ;;
+        *)
+            echo "Error: Unsupported architecture: $ARCH"
+            exit 1
+            ;;
+        esac
+        ;;
+    *)
+        echo "Error: Unsupported OS: $OS"
+        exit 1
+        ;;
+    esac
+}
+
+# Function to download the binary
+download_binary() {
+    echo "Downloading Clipper from $BINARY_URL..."
+    curl -Lo "$TMP_BINARY" "$BINARY_URL" >/dev/null 2>&1 || {
+        echo "Error: Failed to download Clipper."
+        exit 1
+    }
+    echo "Download completed successfully."
+}
+
+# Function to make the binary executable
+make_executable() {
+    echo "Making Clipper executable..."
+    chmod +x "$TMP_BINARY"
+    echo "Clipper is now executable."
+}
+
+# Function to move the binary to /usr/local/bin
+install_binary() {
+    if [ -d "/usr/local/bin" ] && echo "$PATH" | grep -q "/usr/local/bin"; then
+        echo "Installing Clipper to /usr/local/bin..."
+        sudo mv -f "$TMP_BINARY" /usr/local/bin/clipper >/dev/null 2>&1 || {
+            echo "Error: Failed to move Clipper to /usr/local/bin."
+            exit 1
+        }
+        echo "Clipper installed to /usr/local/bin."
+    else
+        echo "Error: Directory /usr/local/bin does not exist or is not in your PATH."
+        exit 1
+    fi
+}
+
+# Function to verify the installation
+verify_installation() {
+    if command -v clipper >/dev/null 2>&1; then
+        echo "Nice! Your $(clipper -v) was installed successfully!"
+    else
+        echo "Error: Installation failed."
+        exit 1
+    fi
+}
+
+# Main script execution
+set_binary_url
+download_binary
+make_executable
+install_binary
+verify_installation
+
+# Clean up temporary directory
+rm -rf "$TMP_DIR"