Add Context Studio Wizard — project scaffolding CLI

- wizard.sh: interactive bash wizard that scaffolds new CS projects
- lib/: utils, core install, project structure, workflow generation
- templates/: Dockerfile, devcontainer.json, agent presets (minimal/standard), system.json, roles, hook rules
- README: setup, usage, mobility workflow

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/core.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# core.sh — manage the global context-studio-core installation
+
+CS_CORE_REPO="git@github.com:KlausUllrich/context-studio-core.git"
+CS_HOME="${CS_HOME:-$HOME/.context-studio}"
+CS_CORE_DIR="$CS_HOME/core"
+
+setup_core() {
+    header "Context Studio Core"
+
+    if [[ -d "$CS_CORE_DIR/.git" ]]; then
+        success "Core already installed at $CS_CORE_DIR"
+        ask_yn _update "Update core to latest?" "n"
+        if [[ "$_update" == "y" ]]; then
+            info "Pulling latest core..."
+            git -C "$CS_CORE_DIR" pull --ff-only \
+                || warn "Pull failed — continuing with existing version"
+            success "Core updated"
+        fi
+        return 0
+    fi
+
+    info "Cloning context-studio-core → $CS_CORE_DIR"
+    mkdir -p "$CS_HOME"
+    git clone "$CS_CORE_REPO" "$CS_CORE_DIR" \
+        || die "Failed to clone context-studio-core. Check your SSH key and network."
+    success "Core installed at $CS_CORE_DIR"
+}