add: local config import and export (#84)

* add: local config import and export

* Fix import refresh flow and typings

* Clarify import refresh messaging

* Limit stored import backups

---------

Co-authored-by: Jason <farion1231@gmail.com>

src-tauri/Cargo.lock

@@ -565,6 +565,7 @@ dependencies = [
 name = "cc-switch"
 version = "3.4.0"
 dependencies = [
+ "chrono",
  "dirs 5.0.1",
  "log",
  "objc2 0.5.2",
@@ -628,8 +629,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "145052bdd345b87320e369255277e3fb5152762ad123a901ef5c262dd38fe8d2"
 dependencies = [
  "iana-time-zone",
+ "js-sys",
  "num-traits",
  "serde",
+ "wasm-bindgen",
  "windows-link 0.2.0",
 ]