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/country/meta.js

@@ -0,0 +1,7 @@
+export default {
+  id: 'country',
+  label: 'Country / Folk',
+  feel: 'boom-chick',
+  tempoRange: [80, 160],
+  character: 'Open strings, alternating bass, and the capo as a transposition machine: the guitar is the band\'s kick drum and snare, and every chord change gets announced by a bass run.',
+}