Create devcontainer.json (#1)

# Create and switch to a new branch for devcontainer feature
git checkout -b feat/devcontainer-setup

# Stage the new devcontainer files
git add .devcontainer/

# Commit the changes
git commit -m "feat(devcontainer): add .devcontainer folder and devcontainer.json for consistent development environment

- Add devcontainer.json with Ubuntu base image
- Include Node.js LTS for GitHub Copilot LSP support
- Add Homebrew feature for package management
- Configure VS Code extensions for Swift and development tools
- Add post-create.sh script for environment setup
- Mount SSH keys for Git authentication
- Configure editor settings for consistent formatting

This provides a consistent Linux development environment for:
- Documentation work
- Script development
- Node.js component testing
- General non-macOS specific tasks

Note: Full Xcode development still requires macOS with Xcode installed."

# Push the branch to remote
git push -u origin feat/devcontainer-setup

Author: Tsukimarf

.devcontainer/devcontainer.json

@@ -0,0 +1,61 @@
+{
+  "name": "CopilotForXcode Development",
+  "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
+  
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "installZsh": true,
+      "installOhMyZsh": true,
+      "upgradePackages": true,
+      "username": "vscode",
+      "userUid": "1000",
+      "userGid": "1000"
+    },
+    "ghcr.io/devcontainers/features/git:1": {
+      "version": "latest"
+    },
+    "ghcr.io/devcontainers/features/node:1": {
+      "version": "lts",
+      "nodeGypDependencies": true
+    },
+    "ghcr.io/devcontainers/features/homebrew:1": {
+      "version": "latest"
+    }
+  },
+
+  "postCreateCommand": "bash .devcontainer/post-create.sh",
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "sswg.swift-lang",
+        "GitHub.copilot",
+        "GitHub.copilot-chat",
+        "ms-vscode.makefile-tools",
+        "streetsidesoftware.code-spell-checker",
+        "eamodio.gitlens"
+      ],
+      "settings": {
+        "terminal.integrated.defaultProfile.linux": "zsh",
+        "editor.formatOnSave": true,
+        "editor.tabSize": 2,
+        "files.insertFinalNewline": true,
+        "files.trimTrailingWhitespace": true
+      }
+    }
+  },
+
+  "remoteUser": "vscode",
+  
+  "mounts": [
+    "source=${localEnv:HOME}/.ssh,target=/home/vscode/.ssh,readonly,type=bind,consistency=cached"
+  ],
+
+  "forwardPorts": [],
+
+  "portsAttributes": {},
+
+  "postAttachCommand": "",
+
+  "updateContentCommand": "git pull"
+}