website: Unify Netlify redirects with Docusaurus's client-side router. (#16430)

* website: Unify Netlify redirects with Docusaurus's client-side router.

* website: Flesh out client-redirects.

* Potential fix for code scanning alert no. 256: Incomplete string escaping or encoding

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Signed-off-by: Teffen Ellis <592134+GirlBossRush@users.noreply.github.com>

* website: Use package.

* website: use permanent redirect.

* Apply suggestions from code review

Co-authored-by: Dewi Roberts <dewi@goauthentik.io>
Signed-off-by: Teffen Ellis <592134+GirlBossRush@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Dewi Roberts <dewi@goauthentik.io>
Signed-off-by: Teffen Ellis <592134+GirlBossRush@users.noreply.github.com>

* website: Spelling.

* website: Add link.

* website: Clarify.

* website: Remove doc.

* website: Add redirects for API and integrations.

---------

Signed-off-by: Teffen Ellis <592134+GirlBossRush@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Co-authored-by: Dewi Roberts <dewi@goauthentik.io>

website/docusaurus-theme/redirects/plugin.mjs

@@ -0,0 +1,49 @@
+/* eslint-disable no-console */
+/**
+ * @file Docusaurus client-side redirects plugin.
+ *
+ * @import { LoadContext, Plugin } from "@docusaurus/types"
+ * @import { RedirectEntry } from "./index.mjs"
+ */
+
+const PLUGIN_NAME = "ak-redirects-plugin";
+
+/**
+ * @typedef {object} AKRedirectsPluginOptions
+ * @property {RedirectEntry[]} redirects parsed redirect entries
+ */
+
+/**
+ * @typedef {object} AKRedirectsPluginData
+ * @property {RedirectEntry[]} redirects parsed redirect entries
+ */
+
+/**
+ * @param {LoadContext} _loadContext
+ * @param {AKRedirectsPluginOptions} options
+ * @returns {Promise<Plugin<AKRedirectsPluginData>>}
+ */
+async function akRedirectsPlugin(_loadContext, { redirects }) {
+    return {
+        name: PLUGIN_NAME,
+
+        async loadContent() {
+            console.log(`🚀 ${PLUGIN_NAME} loaded`);
+
+            /**
+             * @type {AKRedirectsPluginData}
+             */
+            const content = { redirects };
+
+            return content;
+        },
+
+        contentLoaded({ content, actions }) {
+            const { setGlobalData } = actions;
+
+            setGlobalData(content);
+        },
+    };
+}
+
+export default akRedirectsPlugin;