docs: modernize gateway configuration page (Phase 1) (#14111)

* docs(configuration): split into overview + full reference with Mintlify components

* docs(configuration): use tooltip for JSON5 format note

* docs(configuration): fix Accordion closing tags inside list contexts

* docs(configuration): expand intro to reflect full config surface

* docs(configuration): trim intro to three concise bullets

* docs(configuration-examples): revert all branch changes

* docs(configuration): improve hot-reload section with tabs and accordion

* docs(configuration): uncramp hot-reload — subheadings, bullet list, warning

* docs(configuration): restore hot-apply vs restart table

* docs(configuration): fix hot-reload table against codebase

* docs: add configuration-reference.md — full field-by-field reference

* docs(gateway): refresh runbook and align config reference

* docs: include pending docs updates and install graphic

docs/gateway/configuration-examples.md

@@ -67,7 +67,11 @@ Save to `~/.openclaw/openclaw.json` and you can DM the bot from that number.
   // Auth profile metadata (secrets live in auth-profiles.json)
   auth: {
     profiles: {
-      "anthropic:me@example.com": { provider: "anthropic", mode: "oauth", email: "me@example.com" },
+      "anthropic:me@example.com": {
+        provider: "anthropic",
+        mode: "oauth",
+        email: "me@example.com",
+      },
       "anthropic:work": { provider: "anthropic", mode: "api_key" },
       "openai:default": { provider: "openai", mode: "api_key" },
       "openai-codex:default": { provider: "openai-codex", mode: "oauth" },
@@ -375,7 +379,10 @@ Save to `~/.openclaw/openclaw.json` and you can DM the bot from that number.
         to: "+15555550123",
         thinking: "low",
         timeoutSeconds: 300,
-        transform: { module: "./transforms/gmail.js", export: "transformGmail" },
+        transform: {
+          module: "./transforms/gmail.js",
+          export: "transformGmail",
+        },
       },
     ],
     gmail: {