refactor: refactor task logic for better scalability (#76)

* refactor: a big refactor. wip

* refactor: port handle file

* refactor: place all handlers

* fix: task info nil pointer

* feat: enhance task progress tracking and context management

* feat: cancel task

* feat: stream mode

* feat: silent mode

* feat: dir cmd

* refactor: remove unused old file

* feat: rule cmd

* feat: handle silent mode

* feat: batch task

* fix: batch task progress and temp file cleanup

* refactor: update file creation and cleanup methods for better resource management

* feat: add save command with silent mode handling

* feat: message link

* feat: update message prompts to include file count in storage selection

* feat: slient save links

* refactor: reduce dup code

* feat: rule type

* feat: chose dir

* feat: refactor file handling and storage rules, improve error handling and logging

* feat: rule mode

* feat: telegraph pics

* fix: tphpics nil pointer and inaccurate dirpath

* feat: silent save telegraph

* feat: add suffix to avoid file overwrite

* feat: new storage telegram

* chore: tidy go mod

common/cache/ristretto.go

@@ -0,0 +1,50 @@
+package cache
+
+import (
+	"fmt"
+
+	"github.com/charmbracelet/log"
+	"github.com/dgraph-io/ristretto/v2"
+)
+
+var cache *ristretto.Cache[string, any]
+
+
+// TODO: maybe we should use simple ttl cache instead of ristretto...
+func init() {
+	c, err := ristretto.NewCache(&ristretto.Config[string, any]{
+		NumCounters: 1e5,
+		MaxCost:     1e6, // 1000000 / 112 ≈ 8928
+		BufferItems: 64,
+		OnReject: func(item *ristretto.Item[any]) {
+			log.Warnf("Cache item rejected: key=%d, value=%v", item.Key, item.Value)
+		},
+	})
+	if err != nil {
+		log.Fatalf("failed to create ristretto cache: %v", err)
+	}
+	cache = c
+}
+
+func Set(key string, value any) error {
+	ok := cache.Set(key, value, 0)
+	if !ok {
+		return fmt.Errorf("failed to set value in cache")
+	}
+	cache.Wait()
+	return nil
+}
+
+func Get[T any](key string) (T, bool) {
+	v, ok := cache.Get(key)
+	if !ok {
+		var zero T
+		return zero, false
+	}
+	vT, ok := v.(T)
+	if !ok {
+		var zero T
+		return zero, false
+	}
+	return vT, true
+}