Implement branded types without unique symbol (#853)

Author: lorisleiva

.changeset/cool-regions-clap.md

@@ -0,0 +1,5 @@
+---
+'@codama/node-types': patch
+---
+
+Branded types now use exact values instead of TypeScript's more restictive `unique symbol`. This will allow multiple versions of the library to coexist.

packages/node-types/src/shared/stringCases.ts

@@ -1,19 +1,19 @@
 export type TitleCaseString = string & {
-    readonly __stringCase: unique symbol;
+    readonly ['__stringCase:codama']: 'titleCase';
 };
 
 export type PascalCaseString = string & {
-    readonly __stringCase: unique symbol;
+    readonly ['__stringCase:codama']: 'pascalCase';
 };
 
 export type CamelCaseString = string & {
-    readonly __stringCase: unique symbol;
+    readonly ['__stringCase:codama']: 'camelCase';
 };
 
 export type KebabCaseString = string & {
-    readonly __stringCase: unique symbol;
+    readonly ['__stringCase:codama']: 'kebabCase';
 };
 
 export type SnakeCaseString = string & {
-    readonly __stringCase: unique symbol;
+    readonly ['__stringCase:codama']: 'snakeCase';
 };