Add pitch detection, refactor

.gitignore

@@ -16,6 +16,12 @@
 
 # Dependency directories (remove the comment below to include it)
 # vendor/
+.idea/
+.vscode/
+target/
 
 # Go workspace file
 go.work
+
+.DS_Store
+

go/input.go

@@ -0,0 +1,90 @@
+package main
+
+import (
+	"github.com/charmbracelet/bubbles/textinput"
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+type Input interface {
+	Blink() tea.Msg
+	Blur() tea.Cmd
+	Focus() tea.Cmd
+	SetValue(string)
+	Value() string
+	Update(tea.Msg) (Input, tea.Cmd)
+	View() string
+}
+
+type Path struct {
+	textinput textinput.Model
+	placeholder string
+}
+
+func NewPath(placeholder string) *Path {
+	a := Path{}
+	model := textinput.New()
+	model.Placeholder = placeholder
+	model.Focus()
+
+	a.textinput = model
+	return &a
+}
+
+func (a *Path) Blink() tea.Msg {
+	return textinput.Blink()
+}
+
+func (a *Path) Focus() tea.Cmd {
+	return a.textinput.Focus()
+}
+
+func (a *Path) SetValue(s string) {
+	a.textinput.SetValue(s)
+}
+
+func (a *Path) Value() string {
+	return a.textinput.Value()
+}
+
+func (a *Path) Blur() tea.Cmd {
+    a.textinput.Blur()
+	return nil
+}
+
+func (a *Path) Update(msg tea.Msg) (Input, tea.Cmd) {
+	var cmd tea.Cmd
+	a.textinput, cmd = a.textinput.Update(msg)
+	return a, cmd
+}
+
+func (a *Path) View() string {
+	return a.textinput.View()
+}
+
+//Digital representation of LocalFolderPath, WebFolderPath and LocalRootPath
+type LocalFolderPath struct {
+	*Path
+}
+
+func NewLocalFolderPathField() *LocalFolderPath {
+	placeholder := "example: /Users/username/samples/piano"
+	return &LocalFolderPath{NewPath(placeholder)}
+}
+
+type WebFolderPath struct {
+	*Path
+}
+
+func NewWebFolderPathField() *WebFolderPath {
+	placeholder := "example: https://raw.githubusercontent.com/username/samples/main/"
+	return &WebFolderPath{NewPath(placeholder)}
+}
+
+type LocalRootPath struct {
+	*Path
+}
+
+func NewLocalRootPathField() *LocalRootPath {
+	placeholder := "example: /Users/username/samples"
+	return &LocalRootPath{NewPath(placeholder)}
+}