`library` folder not included in the source distribution

**Describe the bug**
The `library` folder is not included in the source distribution built and sent to Pypi:

```
$ tar tf raven_cycode-1.0.9.tar.gz |grep library | wc -l
0
```

Thus, when installing `raven-cycode` using `pip` and the `pypi` repository, the `library` folder isn't available and causes certain commands to fail:

```
$ raven report --format raw
2024-06-04 14:31:42 | ERROR | [Errno 2] No such file or directory: 'library'
```

**To Reproduce**
```
$ pipx install raven-cycode
$ raven report --format raw
```

**Expected behavior**
The `library` folder should be shipped in the source distribution by including them in the package's manifest **and** by instructing `setuptools` to include package data during installation. To my knowledge, this is possible only by moving the `library` folder into the source package tree, otherwise it will likely pollute the Python library namespace.

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Desktop (please complete the following information):**
- Fedora 39
- Python 3.12.3
- Raven 1.0.9

**Additional context**
Side note, currently the package used the folder `src` in the Python package namespace, which is also confusing. I suggest it to be renamed to something like `raven` if it doesn't conflict with other packages namespaces, at least less likely than `src`.