+feature: Create a new collection from JSON file

Author: stargazer33

README.md

@@ -57,6 +57,15 @@ collectionSchema.name("Countries").fields(fields).defaultSortingField("gdp");
 client.collections().create(collectionSchema);
 ```
 
+### Create a new collection from JSON file
+```java
+String schemaJson = new String(
+    Files.readAllBytes(Paths.get("schema.json")),
+    StandardCharsets.UTF_8
+);
+client.collections().create(schemaJson);
+```
+
 ### Index a document
 ```java
 Map<String, Object> hmap = new HashMap<>();

src/main/java/org/typesense/api/Collections.java

@@ -16,6 +16,10 @@ public CollectionResponse create(CollectionSchema c) throws Exception {
         return this.apiCall.post(RESOURCE_PATH, c, null, CollectionResponse.class);
     }
 
+    public CollectionResponse create(String schemaJson) throws Exception {
+        return this.apiCall.post(RESOURCE_PATH, schemaJson, null, CollectionResponse.class);
+    }
+
     public CollectionResponse[] retrieve() throws Exception {
         return this.apiCall.get(RESOURCE_PATH, null, CollectionResponse[].class);
     }