Give bots skills: runbooks they load when a job matches

A skill is a runbook: a name, a unique slug, a one-line description of when
it applies, and the markdown body. A run only ever sees the slug and
description (one load_skill tool carries them), and reads the whole body
only when it calls the tool, so a long runbook costs nothing until needed.

Skills are the third extension kind beside MCP servers and custom tools, on
the same botExtensionsSql path, so per-bot, per-workspace and all-bots
grants work the same way, and attachDefaultExtensions hands an every-bot
skill to new bots. load_skill is a reserved tool name, so a custom tool
cannot shadow it, and a built-in wins a clash.

Managed on Settings > Skills; ExtensionRow links each kind to its own page
and a skill never reports a failure, since nothing connects or runs.

src/pages/admin/settings/skills/index.server.ts

@@ -0,0 +1,20 @@
+import type { PagePropsType } from "@/src/types";
+import type { BunextPageServerFn } from "@moduletrace/bunext/types";
+import grabSkillsOverview from "@/src/functions/backend/db/extensions/grab-skills-overview";
+import grabCrewSettingsServerProps from "../(functions)/grab-crew-settings-server-props";
+
+/**
+ * Super admins and admins: admins only choose who gets each skill.
+ */
+export const server: BunextPageServerFn<PagePropsType> = async (params) => {
+    const settings = await grabCrewSettingsServerProps(params);
+
+    if (!settings.props?.person?.id) return settings;
+
+    return {
+        props: {
+            ...settings.props,
+            skills_overview: await grabSkillsOverview({ user_id: settings.props.person.id }),
+        },
+    };
+};