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.

pnpm-lock.yaml

@@ -726,6 +726,9 @@ importers:
       rotating-file-stream:
         specifier: 3.2.3
         version: 3.2.3
+      shell-quote:
+        specifier: ^1.8.1
+        version: 1.8.2
       slugify:
         specifier: ^1.6.6
         version: 1.6.6
@@ -778,6 +781,9 @@ importers:
       '@types/react-dom':
         specifier: 18.3.0
         version: 18.3.0
+      '@types/shell-quote':
+        specifier: ^1.7.5
+        version: 1.7.5
       '@types/ssh2':
         specifier: 1.15.1
         version: 1.15.1
@@ -4033,6 +4039,9 @@ packages:
   '@types/readable-stream@4.0.20':
     resolution: {integrity: sha512-eLgbR5KwUh8+6pngBDxS32MymdCsCHnGtwHTrC0GDorbc7NbcnkZAWptDLgZiRk9VRas+B6TyRgPDucq4zRs8g==}
 
+  '@types/shell-quote@1.7.5':
+    resolution: {integrity: sha512-+UE8GAGRPbJVQDdxi16dgadcBfQ+KG2vgZhV1+3A1XmHbmwcdwhCUwIdy+d3pAGrbvgRoVSjeI9vOWyq376Yzw==}
+
   '@types/shimmer@1.2.0':
     resolution: {integrity: sha512-UE7oxhQLLd9gub6JKIAhDq06T0F6FnztwMNRvYgjeQSBeMc1ZG/tA47EwfduvkuQS8apbkM/lpLpWsaCeYsXVg==}
 
@@ -11383,6 +11392,8 @@ snapshots:
     dependencies:
       '@types/node': 20.17.51
 
+  '@types/shell-quote@1.7.5': {}
+
   '@types/shimmer@1.2.0': {}
 
   '@types/ssh2@1.15.1':