Adds an Other category to the config

This creates a new optionnal category in the config called other that is
used to configure various aspects of unison.
Currently it only allows to customise the path to the cache directory
which is ~/.unisync by default

src/unisync/config.py

@@ -3,6 +3,7 @@
 
 from configparser import UNNAMED_SECTION
 from dataclasses import dataclass, field
+from pathlib import Path, PosixPath
 import ipaddress
 import configparser
 
@@ -46,6 +47,13 @@ class UnisonConfig:
     bools: list = field(default_factory=list)
     values: dict = field(default_factory=dict)
 
+@dataclass
+class OtherConfig:
+    """
+    Dataclass keeping miscellanous configuration options
+    """
+    cache_dir_path: PosixPath = Path("~/.unisync").expanduser()
+
 @dataclass
 class Config:
     """
@@ -54,6 +62,8 @@ class Config:
     server: ServerConfig
     roots: RootsConfig
     unison: UnisonConfig
+    other: OtherConfig = field(default_factory=OtherConfig)
+
 
 def load_config(config_path:str) -> Config:
     """