chore: initialize project scaffolding and Go module

Set up the cburn project foundation:

- go.mod: Define module "cburn" targeting Go 1.24.2 with core
  dependencies — Cobra (CLI framework), Bubble Tea + Lipgloss
  (TUI), BurntSushi/toml (config), and modernc.org/sqlite (pure-Go
  SQLite for the metrics cache, no CGO required).

- go.sum: Lock all direct and transitive dependency versions for
  reproducible builds.

- main.go: Minimal entry point that delegates to cmd.Execute(),
  following the standard Cobra application pattern.

- .gitignore: Exclude the compiled binary, IDE directories (.idea/,
  .vscode/), and macOS .DS_Store files.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

go.mod

@@ -0,0 +1,46 @@
+module cburn
+
+go 1.24.2
+
+require (
+	github.com/BurntSushi/toml v1.6.0
+	github.com/charmbracelet/bubbles v1.0.0
+	github.com/charmbracelet/bubbletea v1.3.10
+	github.com/charmbracelet/lipgloss v1.1.0
+	github.com/spf13/cobra v1.9.1
+	modernc.org/sqlite v1.46.1
+)
+
+require (
+	github.com/atotto/clipboard v0.1.4 // indirect
+	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/charmbracelet/colorprofile v0.4.1 // indirect
+	github.com/charmbracelet/x/ansi v0.11.6 // indirect
+	github.com/charmbracelet/x/cellbuf v0.0.15 // indirect
+	github.com/charmbracelet/x/term v0.2.2 // indirect
+	github.com/clipperhouse/displaywidth v0.9.0 // indirect
+	github.com/clipperhouse/stringish v0.1.1 // indirect
+	github.com/clipperhouse/uax29/v2 v2.5.0 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-localereader v0.0.1 // indirect
+	github.com/mattn/go-runewidth v0.0.19 // indirect
+	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
+	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/muesli/termenv v0.16.0 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/spf13/pflag v1.0.6 // indirect
+	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
+	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/text v0.3.8 // indirect
+	modernc.org/libc v1.67.6 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+)