feat: make examples cumulative with carry-forward chain and capstone

Add three new sections to all 14 examples:
- "Carry Forward": what output feeds into later examples (01-10)
- "The Cumulative Path": alternative prompt building on previous output (02-10)
- "Now Try It Yourself": personalized template with transferable pattern (all)
- "Building On" callout connecting back to previous examples (02-10)

Add Example 14: Build Your Personal Agent - capstone that guides reader
through writing their own CLAUDE.md, creating a personal skill, connecting
a messaging channel, setting up automation, and testing end-to-end.

Update README with cumulative path diagram, two usage modes, and example 14.
Update GETTING-STARTED.md with cross-references to relevant examples.

17 files changed, 703+ lines added. The examples now form a coherent
learning path from "see what it can do" to "build your own agent."

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

examples/12-remote-control/prompt.md

@@ -113,3 +113,31 @@ running. Workarounds: tmux, Mac Mini, VPS.
 For most "text my agent from my phone" use cases, Channels
 or Dispatch gets the job done. The gap is the always-on
 daemon, not the phone access itself.
+
+---
+
+## Now Try It Yourself
+
+Pick the method that fits how you work:
+
+**If you want "text my agent" (Channels):**
+```
+[From your phone via iMessage/Telegram/Discord]
+Run /weekly-status and send me the summary.
+```
+
+**If you want "fire and forget" (Dispatch):**
+Open Claude Desktop > Cowork > Dispatch. Send a task from your phone.
+
+**If you want "take the wheel" (Remote Control):**
+```
+/rc
+```
+Scan the QR code from your phone. You now have full control.
+
+**The pattern you just learned:** three access methods for three use cases. Channels for reactive messaging, Dispatch for delegated tasks, Remote Control for interactive steering. Most people start with one and add others as needed.
+
+Ideas worth trying:
+- Text "morning briefing" from bed and get a summary before coffee
+- Dispatch "prepare the meeting notes for today" while commuting
+- Use /rc to guide Claude through a debugging session from your couch