Add branching-strategy skill with next and create actions

Version-aware branch naming (X.Y.Z.Q/{TASK_CODE}-{FEATURE}-{SEQ}),
branch creation from origin/test with origin/main fallback, and the
PR-into-test merge rule. Ships a TypeScript CLI (next, create) plus
shell modules (loggers, base, cli) run via Taskfile.

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

scripts/.scripts/cli/lib/-next.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# -------------------------------------------------------------------------------------
+#
+#
+#
+# -------------------------------------------------------------------------------------
+
+_cli__next() {
+  local FUNCTION_NAME="_cli__next"
+  _loggers_info "${FUNCTION_NAME}" "Computing next branch name via TypeScript CLI"
+  npx tsx src/cli/commands.ts --action next "$@"
+}