feat: add composable to support composition api

Author: sebtiz13

src/composables/index.ts

@@ -0,0 +1 @@
+export * from './useKuzzle';

src/composables/useKuzzle.ts

@@ -0,0 +1,15 @@
+import { getCurrentInstance } from 'vue';
+import { Kuzzle } from 'kuzzle-sdk';
+
+export function useKuzzle(): Kuzzle {
+  const vueInstance = getCurrentInstance();
+  // Check only in development mode otherwise throw a false error
+  if (process.env.NODE_ENV !== 'production' && vueInstance === null) {
+    throw new Error(
+      `Missing current instance. useKuzzle() must be called inside <script setup> or setup().`,
+    );
+  }
+
+  const vue = (vueInstance as NonNullable<ReturnType<typeof getCurrentInstance>>).proxy;
+  return vue.$root.$kuzzle;
+}

src/index.ts

@@ -1,4 +1,5 @@
 import '../vue-kuzzle.d';
-export * from './types';
+export * from './composables';
 export * from './helpers';
+export * from './types';
 export * from './plugin';