Add session list

Cargo.lock

@@ -760,10 +760,12 @@ name = "cosmic-greeter"
 version = "0.1.0"
 dependencies = [
  "env_logger",
+ "freedesktop_entry_parser",
  "greetd_ipc",
  "libcosmic",
  "log",
  "pwd",
+ "shlex",
  "tokio",
 ]
 
@@ -1432,6 +1434,16 @@ dependencies = [
  "xdg",
 ]
 
+[[package]]
+name = "freedesktop_entry_parser"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db9c27b72f19a99a895f8ca89e2d26e4ef31013376e56fdafef697627306c3e4"
+dependencies = [
+ "nom",
+ "thiserror",
+]
+
 [[package]]
 name = "freetype-rs"
 version = "0.26.0"
@@ -3488,6 +3500,12 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "shlex"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7cee0529a6d40f580e7a5e6c495c8fbfe21b7b52795ed4bb5e62cdf92bc6380"
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.1"