prompt builder and CLI agent mode (#695)

* WIP prompt builder and --agent mode for CLI

* bumpppppy

* fix opencode icon

* fix other logos

* update prompt, add cta to getting started

* mcp updates

* agent mode init guidance

* more --agent cleanup in init and load

---------

Co-authored-by: Theo Ephraim <theo@dmno.dev>

Author: philmillman

.bumpy/agent-mode.md

@@ -0,0 +1,5 @@
+---
+varlock: patch
+---
+
+Add --agent flag for init and load

bun.lock

@@ -12,6 +12,7 @@
     "astro": "astro"
   },
   "dependencies": {
+    "@iconify/vue": "^5.0.0",
     "@astrojs/mdx": "^4.3.13",
     "@astrojs/partytown": "^2.1.4",
     "@astrojs/sitemap": "^3.7.0",