Function decodeRemainingLength

decodeRemainingLength(bytes: Uint8Array, offset?: number): RemainingLength
Decodes an MQTT remaining-length varint starting at offset.

Reads up to four continuation-flagged bytes and reconstructs the base-128 value, returning both the value and how many bytes it consumed so the caller can advance its cursor. Rejects a varint longer than four bytes, which would exceed MAX_REMAINING_LENGTH.
Parameters
- bytes: Uint8Array
  The buffer to read from.
- offset: number = 0
  Index of the first varint byte; defaults to 0.
Returns RemainingLength
The decoded value and its byte length.
Throws
If the varint runs past the buffer or exceeds four bytes.

Since
1.0.0
Example
```
import { decodeRemainingLength } from 'edgeport/mqtt';

decodeRemainingLength(new Uint8Array([0x80, 0x01])); // { value: 128, bytesUsed: 2 }
```
- Defined in src/mqtt/packet.ts:207