Adds headless login support for the cli app.

Cargo.lock

@@ -2410,6 +2410,7 @@ dependencies = [
  "nextcloud_client",
  "open",
  "reqwest 0.12.28",
+ "rpassword",
  "serde",
  "serde_json",
  "tokio",
@@ -3158,6 +3159,27 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "rpassword"
+version = "7.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2da316a15f47e3d053de9cb2c439650bd8fa4aaeb9365f2e5f27f492ff73c196"
+dependencies = [
+ "libc",
+ "rtoolbox",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "rtoolbox"
+version = "0.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50a0e551c1e27e1731aba276dbeaeac73f53c7cd34d1bda485d02bd1e0f36844"
+dependencies = [
+ "libc",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "rustc-hash"
 version = "2.1.3"