Implement multi-platform build system with pure Go support

- Introduced a comprehensive build system that supports multiple platforms (Linux, macOS, Windows, Android) using pure Go builds (`CGO_ENABLED=0`).
- Updated all build and test scripts to ensure compatibility with the new purego approach, allowing for dynamic loading of `libsecp256k1` at runtime.
- Added detailed documentation on the build process, platform detection, and deployment options.
- Enhanced CI/CD workflows to automate builds for all supported platforms and include necessary libraries in releases.
- Updated `.gitignore` to exclude build output files.
- Created new documentation files for deployment and multi-platform build summaries.

scripts/run-orly.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+
+# Universal run script for ORLY relay
+# Automatically selects the correct binary for the current platform
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+# Source platform detection
+source "$SCRIPT_DIR/platform-detect.sh"
+
+# Get version
+VERSION=$(cat "$REPO_ROOT/pkg/version/version")
+
+# Detect platform
+PLATFORM=$(detect_platform)
+if [ $? -ne 0 ]; then
+    echo "Error: Could not detect platform"
+    exit 1
+fi
+
+echo "Detected platform: $PLATFORM"
+
+# Get binary name
+BINARY_NAME=$(get_binary_name "$VERSION")
+BINARY_PATH="$REPO_ROOT/build/$BINARY_NAME"
+
+# Check if binary exists
+if [ ! -f "$BINARY_PATH" ]; then
+    echo "Error: Binary not found: $BINARY_PATH"
+    echo ""
+    echo "Please run: ./scripts/build-all-platforms.sh"
+    exit 1
+fi
+
+# Get library name and set library path
+LIBRARY_NAME=$(get_library_name)
+LIBRARY_PATH="$REPO_ROOT/build/$LIBRARY_NAME"
+
+if [ -f "$LIBRARY_PATH" ]; then
+    case "$PLATFORM" in
+        linux-*)
+            export LD_LIBRARY_PATH="$REPO_ROOT/build:${LD_LIBRARY_PATH:-}"
+            ;;
+        darwin-*)
+            export DYLD_LIBRARY_PATH="$REPO_ROOT/build:${DYLD_LIBRARY_PATH:-}"
+            ;;
+        windows-*)
+            export PATH="$REPO_ROOT/build:${PATH:-}"
+            ;;
+    esac
+    echo "Library path set for: $LIBRARY_NAME"
+else
+    echo "Warning: Library not found: $LIBRARY_PATH"
+    echo "Binary may not work if it requires libsecp256k1"
+fi
+
+echo "Running: $BINARY_NAME"
+echo ""
+
+# Execute the binary with all arguments passed to this script
+exec "$BINARY_PATH" "$@"
+