refactor(commands): separate commands and its core into two folders (#32)

- I think it would be better if one for commands only, one for the spec
handling core logic so people won't be confused by the core logic inside
the commands folder (cleaner I guess)
- Regen docs

integration/overlay.go

@@ -9,7 +9,7 @@ import (
 	"unicode/utf8"
 
 	"github.com/charmbracelet/lipgloss"
-	"github.com/versenilvis/iris/commands/core"
+	"github.com/versenilvis/iris/spec"
 	"github.com/versenilvis/iris/config"
 	"github.com/versenilvis/iris/logger"
 	"golang.org/x/term"
@@ -161,7 +161,7 @@ func SetTheme(t Theme) {
 type Overlay struct {
 	mu            sync.Mutex
 	Visible       bool
-	Items         []core.Suggestion
+	Items         []spec.Suggestion
 	Cursor        int
 	StartIdx      int
 	LastGhostLen  int
@@ -183,7 +183,7 @@ func NewOverlay() *Overlay {
 	return &Overlay{Visible: false, Cursor: 0, StartIdx: 0}
 }
 
-func (o *Overlay) UpdateItems(items []core.Suggestion) {
+func (o *Overlay) UpdateItems(items []spec.Suggestion) {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	o.Items = items
@@ -247,7 +247,7 @@ func (o *Overlay) ResetCursor() {
 	o.Cursor = 0
 }
 
-func (o *Overlay) SetQueryAndItems(query string, items []core.Suggestion) {
+func (o *Overlay) SetQueryAndItems(query string, items []spec.Suggestion) {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	o.TypedQuery = query
@@ -291,7 +291,7 @@ func (o *Overlay) MoveCursor(dir string) (moved bool, selectedCmd string) {
 	return true, o.Items[o.Cursor].Cmd
 }
 
-func (o *Overlay) SetHistoryList(items []core.Suggestion, startAtBottom bool) string {
+func (o *Overlay) SetHistoryList(items []spec.Suggestion, startAtBottom bool) string {
 	o.mu.Lock()
 	defer o.mu.Unlock()
 	o.TypedQuery = ""