fix: prevent binary file corruption when encoding to base64

The base64-encoder was converting base64 strings back to buffers before
pushing them to the stream, which caused them to be re-encoded as UTF-8
bytes. This corrupted binary files (images, PDFs, etc.) when they were
committed and pushed to GitHub.

Changes:
- base64-encoder.ts: Push base64 strings directly instead of converting
  them back to buffers. This prevents the double-encoding that was
  corrupting binary data.
- blob.ts: Remove UTF-8 encoding from file stream reading. Files are now
  read as raw buffers, which is necessary for the base64 encoder to work
  correctly with both text and binary files.

The fix ensures that:
- Binary files (PNG, JPG, PDF, etc.) are encoded without corruption
- Text files continue to work correctly
- The action properly base64 encodes file content for GitHub API

Fixes image corruption when committing and pushing images to GitHub

Author: Nr18

.gitignore

@@ -1,4 +1,5 @@
 .envrc
+.idea/
 
 # Logs
 logs

dist/index.js

@@ -29884,8 +29884,11 @@ class Blob {
         if (!fs.existsSync(this.absolutePath)) {
             throw new Error(`File does not exist, path: ${this.absolutePath}`);
         }
+        // Always read files as raw buffers without encoding
+        // The Base64Encoder works with buffers for both text and binary files
+        // Using any encoding (like 'utf8') corrupts the data
         return fs
-            .createReadStream(this.absolutePath, { encoding: 'utf8' })
+            .createReadStream(this.absolutePath)
             .pipe(new base64_encoder_1.default());
     }
     load() {
@@ -30591,12 +30594,12 @@ class Base64Encoder extends node_stream_1.Transform {
             chunk = chunk.subarray(0, chunk.length - overflowSize);
         }
         const base64String = chunk.toString('base64');
-        this.push(node_buffer_1.Buffer.from(base64String));
+        this.push(base64String);
         callback();
     }
     _flush(callback) {
         if (this.overflow) {
-            this.push(node_buffer_1.Buffer.from(this.overflow.toString('base64')));
+            this.push(this.overflow.toString('base64'));
         }
         callback();
     }

src/stream/base64-encoder.ts

@@ -25,13 +25,13 @@ export default class Base64Encoder extends Transform {
     }
 
     const base64String = chunk.toString('base64')
-    this.push(Buffer.from(base64String))
+    this.push(base64String)
     callback()
   }
 
   _flush(callback: TransformCallback): void {
     if (this.overflow) {
-      this.push(Buffer.from(this.overflow.toString('base64')))
+      this.push(this.overflow.toString('base64'))
     }
     callback()
   }