feat: add Base64 encoder/decoder tool component

- Implemented a new Base64 tool with encoding and decoding functionalities.
- Updated the tool index to include the new Base64 component with appropriate description and icon.

src/components/tool/base64.tsx

@@ -0,0 +1,70 @@
+import { useState, type FC } from "react";
+import { Textarea } from "@/components/ui/textarea";
+import { Button } from "@/components/ui/button";
+import { toast } from "sonner";
+import { ArrowLeftIcon, ArrowRightIcon } from "lucide-react";
+
+const Tool: FC = () => {
+  const [decoded, setDecoded] = useState<string>("");
+  const [encoded, setEncoded] = useState<string>("");
+
+  const encode = () => {
+    try {
+      const encoded64 = btoa(decoded);
+      setEncoded(encoded64);
+      setDecoded("");
+      toast.success("encoded successfully");
+    } catch (error: unknown) {
+      if (error instanceof Error) {
+        toast.error(error.message);
+      } else {
+        toast.error("encoding failed");
+      }
+    }
+  };
+
+  const decode = () => {
+    try {
+      const decoded64 = atob(encoded);
+      setDecoded(decoded64);
+      setEncoded("");
+      toast.success("decoded successfully");
+    } catch (error: unknown) {
+      if (error instanceof Error) {
+        toast.error(error.message);
+      } else {
+        toast.error("decoding failed");
+      }
+    }
+  };
+
+  return (
+    <div className="h-[50vh] flex flex-row gap-4 pt-[20vh]">
+      <Textarea
+        className="flex-1 resize-none"
+        placeholder="Enter the original text"
+        value={decoded}
+        onChange={(e) => setDecoded(e.target.value)}
+      />
+      <div className="flex flex-col gap-2 justify-center">
+        <Button onClick={encode}>
+          <ArrowRightIcon className="size-4" />
+          Encode
+        </Button>
+        <Button onClick={decode}>
+          <ArrowLeftIcon className="size-4" />
+          Decode
+        </Button>
+      </div>
+      <Textarea
+        className="flex-1 resize-none"
+        placeholder="Enter the Base64 encoded text"
+        value={encoded}
+        onChange={(e) => setEncoded(e.target.value)}
+      />
+    </div>
+  );
+};
+
+export default Tool;
+

src/components/tool/index.tsx

@@ -1,8 +1,9 @@
 import type { ReactNode } from 'react';
-import { FileJson, Hash } from 'lucide-react'
+import { FileJson, Hash, Binary } from 'lucide-react'
 
 import UUID from './uuid'
 import JSON from './json'
+import Base64 from './base64'
 
 export interface Tool {
   path: string;
@@ -26,5 +27,12 @@ export const tools: Tool[] = [
     description: "Format and validate JSON",
     icon: <FileJson />,
     component: <JSON />,
+  },
+  {
+    path: "base64",
+    name: "Base64 Encoder/Decoder",
+    description: "Encode and decode Base64",
+    icon: <Binary />,
+    component: <Base64 />,
   }
 ];