feat: enhance environment variable handling for shell commands

- Added `prepareEnvironmentVariablesForShell` function to properly escape environment variables for shell usage.
- Updated various builders (Docker, Heroku, Nixpacks, Paketo, Railpack) to utilize the new function for improved handling of special characters in environment variables.
- Introduced tests to validate the handling of environment variables with various special characters, ensuring robustness in shell command execution.
- Added `shell-quote` dependency to manage quoting of shell arguments effectively.

packages/server/package.json

@@ -75,6 +75,7 @@
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "rotating-file-stream": "3.2.3",
+    "shell-quote": "^1.8.1",
     "slugify": "^1.6.6",
     "ssh2": "1.15.0",
     "toml": "3.0.0",
@@ -93,6 +94,7 @@
     "@types/qrcode": "^1.5.5",
     "@types/react": "^18.3.5",
     "@types/react-dom": "^18.3.0",
+    "@types/shell-quote": "^1.7.5",
     "@types/ssh2": "1.15.1",
     "@types/ws": "8.5.10",
     "drizzle-kit": "^0.30.6",