docs: update docs for Stackflow v2 stable API (#701)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: tonyfromundefined

docs/pages/api-references/_meta.en.json

@@ -1,4 +1,4 @@
 {
-  "future-api": "Future API",
+  "config": "@stackflow/config",
   "plugins": "Plugins"
 }

docs/pages/api-references/_meta.ko.json

@@ -1,4 +1,4 @@
 {
-  "future-api": "퓨처 API",
+  "config": "@stackflow/config",
   "plugins": "플러그인"
 }

…/api-references/future-api/config.en.mdx docs/pages/api-references/config.en.mdxdocs/pages/api-references/future-api/config.en.mdx renamed to docs/pages/api-references/config.en.mdx docs/pages/api-references/future-api/config.en.mdx renamed to docs/pages/api-references/config.en.mdx

@@ -1,5 +1,5 @@
 import { Callout } from "nextra-theme-docs";
-import { APITable } from "../../../components/APITable";
+import { APITable } from "../../components/APITable";
 
 # `@stackflow/config`
 

…/api-references/future-api/config.ko.mdx docs/pages/api-references/config.ko.mdxdocs/pages/api-references/future-api/config.ko.mdx renamed to docs/pages/api-references/config.ko.mdx docs/pages/api-references/future-api/config.ko.mdx renamed to docs/pages/api-references/config.ko.mdx

@@ -1,5 +1,5 @@
 import { Callout } from "nextra-theme-docs";
-import { APITable } from "../../../components/APITable";
+import { APITable } from "../../components/APITable";
 
 # `@stackflow/config`