fix: Replace deprecated strings.Title with cases.Title (gt-jdn2t)

Use golang.org/x/text/cases.Title(language.English) instead of the
deprecated strings.Title function. Updated formula.go (3 usages)
and patrol_helpers.go (1 usage).

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

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

go.mod

@@ -3,14 +3,16 @@ module github.com/steveyegge/gastown
 go 1.24.0
 
 require (
+	github.com/BurntSushi/toml v1.6.0
 	github.com/charmbracelet/bubbles v0.21.0
 	github.com/charmbracelet/bubbletea v1.3.10
 	github.com/charmbracelet/lipgloss v1.1.0
 	github.com/spf13/cobra v1.8.1
+	golang.org/x/term v0.38.0
+	golang.org/x/text v0.3.8
 )
 
 require (
-	github.com/BurntSushi/toml v1.6.0 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
 	github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc // indirect
 	github.com/charmbracelet/x/ansi v0.10.1 // indirect
@@ -29,6 +31,4 @@ require (
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
 	golang.org/x/sys v0.39.0 // indirect
-	golang.org/x/term v0.38.0 // indirect
-	golang.org/x/text v0.3.8 // indirect
 )