Add TOML versions of formulas (gt-xmyha)

Converted all .formula.json files to .formula.toml using bd formula convert.
TOML provides better ergonomics:
- Multi-line strings without \n escaping
- Human-readable diffs
- Comments allowed

Original JSON files retained for backwards compatibility.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.beads/formulas/shiny-secure.formula.toml

@@ -0,0 +1,8 @@
+description = "Shiny workflow with security audit aspect applied."
+extends = ["shiny"]
+formula = "shiny-secure"
+type = "workflow"
+version = 1
+
+[compose]
+aspects = ["security-audit"]