[FEAT]: combine code configures dict w/ `config.toml` configures table

### Step 1.

Create `config.toml`:

```toml
[core]
rule_dirs = ["rules"]
```

### Step 2.

Create `main.py`:

```py3
from hrc.core import Core

core = Core(hot_reload=True, config_dict={'core': {'rules':['plugins.thePool']}})

if __name__ == '__main__':
core.run()
```

### step 3.

Run code by using `pdm run main.py`.
This will combine both of the config dict and config table.