chore: remove dead code and binary files from tracking

Remove unused global var `in`, func `strout`, func `echoConsoleInput`,
func `padRight`, func `ErrorP`, and func `ErrorF`. Inline error check
in CloseSerial. Add COM.exe and coverage.out to .gitignore.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

go.mod

@@ -4,12 +4,15 @@ go 1.22
 
 require (
 	github.com/charmbracelet/bubbles v0.18.0
+	github.com/charmbracelet/bubbletea v0.25.0
+	github.com/charmbracelet/lipgloss v0.9.1
 	github.com/fzdwx/infinite v0.12.1
-	github.com/gobwas/ws v1.4.0
 	github.com/spf13/pflag v1.0.5
 	github.com/trzsz/trzsz-go v1.1.7
+	github.com/yuin/gopher-lua v1.1.1
 	github.com/zimolab/charsetconv v0.1.2
 	go.bug.st/serial v1.6.2
+	golang.org/x/sys v0.19.0
 	golang.org/x/term v0.19.0
 )
 
@@ -19,8 +22,6 @@ require (
 	github.com/alexflint/go-scalar v1.2.0 // indirect
 	github.com/atotto/clipboard v0.1.4 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
-	github.com/charmbracelet/bubbletea v0.25.0 // indirect
-	github.com/charmbracelet/lipgloss v0.9.1 // indirect
 	github.com/chzyer/readline v1.5.1 // indirect
 	github.com/containerd/console v1.0.4-0.20230313162750-1ae8d489ac81 // indirect
 	github.com/creack/goselect v0.1.2 // indirect
@@ -28,8 +29,6 @@ require (
 	github.com/dchest/jsmin v0.0.0-20220218165748-59f39799265f // indirect
 	github.com/duke-git/lancet/v2 v2.2.1 // indirect
 	github.com/fzdwx/iter v0.0.0-20230511075109-0afee9319312 // indirect
-	github.com/gobwas/httphead v0.1.0 // indirect
-	github.com/gobwas/pool v0.2.1 // indirect
 	github.com/josephspurrier/goversioninfo v1.4.0 // indirect
 	github.com/klauspost/compress v1.17.4 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
@@ -50,6 +49,5 @@ require (
 	golang.org/x/exp v0.0.0-20230522175609-2e198f4a06a1 // indirect
 	golang.org/x/image v0.14.0 // indirect
 	golang.org/x/sync v0.2.0 // indirect
-	golang.org/x/sys v0.19.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 )