change loading bar size (#550)

## 📝 Description

**What does this PR do and why is this change necessary?**

Change the length of the loading bar based on width of terminal.

## ✔️ How to Test

```bash
lin obj mb bucketiquette
lin obj put file.txt bucketiquette
```

Author: jriddle-linode

linodecli/plugins/obj/config.py

@@ -1,6 +1,7 @@
 """
 The config of the object storage plugin.
 """
+import shutil
 
 ENV_ACCESS_KEY_NAME = "LINODE_CLI_OBJ_ACCESS_KEY"
 ENV_SECRET_KEY_NAME = "LINODE_CLI_OBJ_SECRET_KEY"
@@ -15,7 +16,8 @@
 # for help commands
 PLUGIN_BASE = "linode-cli obj"
 
-PROGRESS_BAR_WIDTH = 100
+columns = shutil.get_terminal_size(fallback=(80, 24)).columns
+PROGRESS_BAR_WIDTH = columns - 20 if columns > 30 else columns
 
 # constant error messages
 NO_SCOPES_ERROR = """Your OAuth token isn't authorized to create Object Storage keys.

linodecli/plugins/obj/helpers.py

@@ -26,8 +26,9 @@ def __call__(self, bytes_amount: int):
         if not self.size:
             return
         self.uploaded += bytes_amount
-        percentage = self.bar_width * (self.uploaded / self.size)
-        progress = int(percentage)
+        percentage = 100 * (self.uploaded / self.size)
+        uploaded = self.bar_width * (self.uploaded / self.size)
+        progress = int(uploaded)
         progress_bar = ("#" * progress) + ("-" * (self.bar_width - progress))
         print(f"\r |{progress_bar}| {percentage:.1f}%", end="\r")
         if self.uploaded == self.size: