introduce use env_logger

related to https://github.com/denisidoro/navi/issues/576

For the following config

cheats:
  paths:
    - C:\\Users\\Administrator\\AppData\\Roaming\\navi\\cheat
    - C:\\Users\\Administrator\\AppData\\Roaming\\navi\\cheat

navi now gets incorrect paths on Windows, since the seperator `:` for
path join is a valid component.

[2023-05-12T08:58:26Z DEBUG navi::commands::core] Filesystem(
        Some(
            "C:\\\\Users\\\\Administrator\\\\AppData\\\\Roaming\\\\navi\\\\cheat:C:\\\\Users\\\\Administrator\\\\AppData\\\\Roaming\\\\navi\\\\cheat",
        ),
    )
[2023-05-12T08:58:28Z DEBUG navi::filesystem] filesystem::Fetcher = Fetcher {
        path: Some(
            "C:\\\\Users\\\\Administrator\\\\AppData\\\\Roaming\\\\navi\\\\cheat:C:\\\\Users\\\\Administrator\\\\AppData\\\\Roaming\\\\navi\\\\cheat",
        ),
        files: RefCell {
            value: [],
        },
    }

1 files changed, 1 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 53eaa21..3f2d71b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /target
 **/*.rs.bk
+navi.log