Add extension artifacts: install.sh, goose-config.yaml, README

- install.sh: cross-platform downloader for gitea-mcp binary
- goose-config.yaml: ready-to-copy config entry for ~/.config/goose/config.yaml
- README.md: comprehensive setup guide with architecture, tool list, and troubleshooting

install.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+# install.sh — Download and install gitea-mcp for Goose+Gitea integration
+set -euo pipefail
+
+VERSION="${GITEA_MCP_VERSION:-1.3.0}"
+BINDIR="${BINDIR:-/usr/local/bin}"
+
+detect_platform() {
+    local os arch
+    case "$(uname -s)" in
+        Darwin) os="Darwin" ;;
+        Linux)  os="Linux" ;;
+        *)      echo "Unsupported OS: $(uname -s)"; exit 1 ;;
+    esac
+    case "$(uname -m)" in
+        arm64|aarch64) arch="arm64" ;;
+        x86_64|amd64)  arch="x86_64" ;;
+        *)             echo "Unsupported arch: $(uname -m)"; exit 1 ;;
+    esac
+    echo "${os}_${arch}"
+}
+
+PLATFORM=$(detect_platform)
+TARBALL="gitea-mcp_${PLATFORM}.tar.gz"
+URL="https://gitea.com/gitea/gitea-mcp/releases/download/v${VERSION}/${TARBALL}"
+
+echo "==> Platform: ${PLATFORM}"
+echo "==> Downloading gitea-mcp v${VERSION}..."
+curl -fsSL "$URL" -o "/tmp/${TARBALL}"
+
+echo "==> Extracting..."
+tar -xzf "/tmp/${TARBALL}" -C /tmp/
+
+echo "==> Installing to ${BINDIR}/gitea-mcp..."
+sudo mkdir -p "$BINDIR"
+sudo mv /tmp/gitea-mcp "${BINDIR}/gitea-mcp"
+sudo chmod +x "${BINDIR}/gitea-mcp"
+
+rm -f "/tmp/${TARBALL}"
+
+echo "==> Done! Version: $(${BINDIR}/gitea-mcp -v)"
+echo ""
+echo "Next: Add the config entry from goose-config.yaml to ~/.config/goose/config.yaml"
+echo "      Then restart Goose and start a NEW chat session."