chore: move csv_path_p, restructure modules

src/main.rs

@@ -7,7 +7,9 @@ mod persistence;
 mod ui;
 mod view;
 
-use std::path::{Path, PathBuf};
+use crate::import::csv_parser::csv_path_p;
+
+use std::path::PathBuf;
 
 use anyhow::{Context, Result};
 
@@ -42,11 +44,6 @@ impl Runnable for CmdLineArgs {
     }
 }
 
-fn csv_path_p(path: &Path) -> bool {
-    path.extension()
-        .is_some_and(|ext| ext.eq_ignore_ascii_case("csv"))
-}
-
 fn get_import_data(path: PathBuf) -> Option<Value> {
     match std::fs::read_to_string(&path) {
         Err(e) => {