Add wd devcontainer feature

features/src/wd/README.md

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+# wd
+
+Installs [wd](https://github.com/shokkunrf/wd) via the official installer, a CLI tool for managing git worktrees with devcontainer support.
+
+## Usage
+
+```json
+{
+  "features": {
+    "ghcr.io/shokkunrf/devcontainer-features/wd": {}
+  }
+}
+```
+
+## Options
+
+| Option    | Type   | Default    | Description                                                                          |
+| --------- | ------ | ---------- | ------------------------------------------------------------------------------------ |
+| `version` | string | `"latest"` | Version of wd to install (e.g., `v1.1.1`). Use `latest` for the most recent release. |
+
+## Requirements
+
+- `curl` or `wget`
+- `git`
+
+## Examples
+
+Install a specific version:
+
+```json
+{
+  "features": {
+    "ghcr.io/devcontainers/features/git": {},
+    "ghcr.io/shokkunrf/devcontainer-features/wd": {
+      "version": "v1.1.1"
+    }
+  }
+}
+```

features/src/wd/devcontainer-feature.json

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+{
+  "id": "wd",
+  "version": "1.0.0",
+  "name": "wd",
+  "documentationURL": "https://github.com/shokkunrf/devcontainer/blob/develop/features/src/wd/README.md",
+  "description": "Installs wd, a git worktree management tool",
+  "options": {
+    "version": {
+      "type": "string",
+      "default": "latest",
+      "description": "Version of wd to install (e.g., 'v1.1.1'). Use 'latest' for the most recent release."
+    }
+  },
+  "installsAfter": ["ghcr.io/devcontainers/features/common-utils"]
+}

features/src/wd/install.sh

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+#!/bin/sh
+# References:
+#   - https://github.com/shokkunrf/wd
+
+set -eu
+
+echo "Activating feature 'wd'"
+
+VERSION="${VERSION:-latest}"
+
+# Validate version format
+if [ "$VERSION" != "latest" ]; then
+    case "$VERSION" in
+        v[0-9]*)  ;; # e.g., v1.0.0, v1.1.1
+        *)
+            echo "ERROR: Invalid version format: '$VERSION'"
+            echo "Expected 'latest' or a version tag (e.g., 'v1.1.0')."
+            exit 1
+            ;;
+    esac
+fi
+
+if [ "$VERSION" = "latest" ]; then
+    _url="https://github.com/shokkunrf/wd/releases/latest/download/install.sh"
+else
+    _url="https://github.com/shokkunrf/wd/releases/download/$VERSION/install.sh"
+fi
+
+if command -v curl >/dev/null 2>&1; then
+    curl -fsSL "$_url" | sh
+elif command -v wget >/dev/null 2>&1; then
+    wget -qO- "$_url" | sh
+else
+    echo "ERROR: curl or wget is required but not found!"
+    exit 1
+fi

features/test/wd/devcontainer-base-alpine.sh

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+test-posix.sh

features/test/wd/devcontainer-base-debian.sh

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+test.sh

features/test/wd/official-debian.sh

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+test.sh

features/test/wd/scenarios.json

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+{
+  "official-debian": {
+    "image": "debian:trixie",
+    "features": {
+      "ghcr.io/devcontainers/features/common-utils": {},
+      "wd": {}
+    }
+  },
+  "devcontainer-base-debian": {
+    "image": "mcr.microsoft.com/devcontainers/base:debian",
+    "features": {
+      "wd": {
+        "version": "v1.1.1"
+      }
+    },
+    "remoteUser": "vscode"
+  },
+  "devcontainer-base-alpine": {
+    "image": "mcr.microsoft.com/devcontainers/base:alpine",
+    "features": {
+      "wd": {}
+    },
+    "remoteUser": "vscode"
+  }
+}

features/test/wd/test-posix.sh

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+#!/bin/sh
+# POSIX-compliant test script (no bash required)
+
+set -e
+
+FAILED=""
+
+check() {
+    LABEL="$1"
+    shift
+    printf '\n\n'
+    printf "🔄 Testing '%s'\n" "$LABEL"
+    printf '\033[37m\n'
+    if "$@"; then
+        printf '\n\n'
+        printf "✅  Passed '%s'!\n" "$LABEL"
+        return 0
+    else
+        printf '\n\n'
+        printf "❌ %s check failed.\n" "$LABEL" >&2
+        FAILED="$FAILED $LABEL"
+        return 1
+    fi
+}
+
+reportResults() {
+    printf '\n\n'
+    if [ -n "$FAILED" ]; then
+        printf "💥  Failed tests:%s\n" "$FAILED" >&2
+        exit 1
+    else
+        printf 'Test Passed!\n'
+        exit 0
+    fi
+}
+
+# Definition specific tests
+check "wd is installed" wd --version
+
+# Report result
+reportResults

features/test/wd/test.sh

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+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+# Definition specific tests
+check "wd is installed" wd --version
+
+# Report result
+reportResults