Add initial support for opening a file in the file manager, still needs more work

resources/assets/scripts/api/server/files/getFileContents.ts

@@ -0,0 +1,11 @@
+import http from "@/api/http";
+
+export default (server: string, file: string): Promise<string> => {
+    return new Promise((resolve, reject) => {
+        http.get(`/api/client/servers/${server}/files/contents`, {
+            params: { file }
+        })
+            .then(response => resolve(response.data))
+            .catch(reject);
+    });
+}