fix(cli): pass pluginInstances to getPluginConfig to support non-array plugins (#1246)

Passing the raw `plugins` array to `getPluginConfig` caused a TypeError
when `plugins` contained non-array entries (e.g. function plugins), as
`data[1]` would be undefined. Since `pluginInstances` is already filtered
to only `docusaurus-plugin-openapi-docs` tuples, passing it instead is
both correct and safe. Also prevents incorrect matches when another plugin
shares the same ID as the openapi-docs plugin.

Fixes #1246
Closes #1263

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: sserrata

packages/docusaurus-plugin-openapi-docs/src/index.ts

@@ -764,7 +764,7 @@ custom_edit_url: null
           let targetDocsPluginId: any;
           if (pluginId) {
             try {
-              const pluginConfig = getPluginConfig(plugins, pluginId);
+              const pluginConfig = getPluginConfig(pluginInstances, pluginId);
               targetConfig = pluginConfig.config ?? {};
               targetDocsPluginId = pluginConfig.docsPluginId;
             } catch {
@@ -835,7 +835,7 @@ custom_edit_url: null
           let targetDocsPluginId: any;
           if (pluginId) {
             try {
-              const pluginConfig = getPluginConfig(plugins, pluginId);
+              const pluginConfig = getPluginConfig(pluginInstances, pluginId);
               targetConfig = pluginConfig.config ?? {};
               targetDocsPluginId = pluginConfig.docsPluginId;
             } catch {
@@ -933,7 +933,7 @@ custom_edit_url: null
           let targetConfig: any;
           if (pluginId) {
             try {
-              const pluginConfig = getPluginConfig(plugins, pluginId);
+              const pluginConfig = getPluginConfig(pluginInstances, pluginId);
               targetConfig = pluginConfig.config ?? {};
             } catch {
               console.error(
@@ -992,7 +992,7 @@ custom_edit_url: null
           let targetConfig: any;
           if (pluginId) {
             try {
-              const pluginConfig = getPluginConfig(plugins, pluginId);
+              const pluginConfig = getPluginConfig(pluginInstances, pluginId);
               targetConfig = pluginConfig.config ?? {};
             } catch {
               console.error(