feat: add the-ballad-of-chalk campaign

Cloud Empress campaign for 弗莱格, a sellsword obsessed with chalk.
Ships the brief, PC sheet, state files, a starting location, and the
session 0001 log. The opening hook and hidden truth live in gm/.

campaigns/the-ballad-of-chalk/world/factions/README.md

@@ -0,0 +1,24 @@
+# Factions
+
+One file per faction, named `kebab-case.md`.
+
+These files are player-facing: record what the PC has observed or been told. A
+hidden agenda or an off-screen plan belongs in `../../gm/`.
+
+```markdown
+---
+name: 
+goal: 
+disposition: friendly | neutral | hostile | unknown
+---
+
+# <name>
+
+## Description
+
+## Members
+
+## Resources
+
+## History
+```