feat(env): support variable flag directives in developer view (#12349)

app/Models/SharedEnvironmentVariable.php

@@ -11,6 +11,14 @@ class SharedEnvironmentVariable extends Model
 {
     use Auditable;
 
+    /**
+     * Flags that a "# coolify:" line of the developer view can set, with their defaults.
+     * Shared variables have no buildtime or runtime flags.
+     *
+     * @var array<string, bool>
+     */
+    public const DEV_VIEW_FLAG_DEFAULTS = ['literal' => false];
+
     protected $fillable = [
         // Core identification
         'key',
@@ -40,6 +48,7 @@ class SharedEnvironmentVariable extends Model
     protected $casts = [
         'key' => 'string',
         'value' => 'encrypted',
+        'is_literal' => 'boolean',
     ];
 
     /**