kb: add country/folk guitar pack

5 progressions (8-bar country I-IV-V, Wagon Wheel folk axis, ragtime
I-VI7-II7-V7 circle, Rising Sun 6/8 climb with corrected changes,
bluegrass I-IV-I-V) x 2 plays: open G/C-family boom-chick sets with
capo strategy, anchor-finger folk grips, barre fallbacks. Comping
documents boom-chick, Carter bass runs, Travis picking, train beat,
waltz. Sourced Lester Flatt G-run licks. Research corrections honoured
(Rising Sun is i-III-IV-VI, not Andalusian; ragtime is the full VI7
circle). Validator and build green.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/data/kb/index.js

@@ -18,6 +18,9 @@ import funkGuitar from './funk/guitar.js'
 import reggaeMeta from './reggae/meta.js'
 import reggaeProgressions from './reggae/progressions.js'
 import reggaeGuitar from './reggae/guitar.js'
+import countryMeta from './country/meta.js'
+import countryProgressions from './country/progressions.js'
+import countryGuitar from './country/guitar.js'
 
 export default {
   jazz: {
@@ -50,4 +53,9 @@ export default {
     progressions: reggaeProgressions,
     instruments: { guitar: reggaeGuitar },
   },
+  country: {
+    meta: countryMeta,
+    progressions: countryProgressions,
+    instruments: { guitar: countryGuitar },
+  },
 }