Import anyhow::Result across the codebase

There is no need to fully qualify this type because it is a type
alias for std::Result. We can mix and match the two as we want.

swap/src/fs.rs

@@ -1,4 +1,4 @@
-use anyhow::Context;
+use anyhow::{Context, Result};
 use directories_next::ProjectDirs;
 use std::path::{Path, PathBuf};
 
@@ -9,7 +9,7 @@ fn default_config_dir() -> Option<PathBuf> {
     ProjectDirs::from("", "", "xmr-btc-swap").map(|proj_dirs| proj_dirs.config_dir().to_path_buf())
 }
 
-pub fn default_config_path() -> anyhow::Result<PathBuf> {
+pub fn default_config_path() -> Result<PathBuf> {
     default_config_dir()
         .map(|dir| Path::join(&dir, "config.toml"))
         .context("Could not generate default configuration path")