Implement file encoding\decoding

### Prerequisites

Check if the issue is already reported.

### Description

[Description of the bug or feature]

### Versions

[Please include the OS and what version of `Quadre` you're running.]

### Steps to Reproduce

1. [First Step]
2. [Second Step]
3. [and so on...]

**Expected behavior:** [What you expected to happen]

**Actual behavior:** [What actually happened]
