Add --expansion-bay command to print info

```
> framework_tool.exe --expansion-bay
Expansion Bay
  Serial Number: FRAXXXXXXXXXXXXXXX
```

TODO:

- [x] Try with dGPU
- [ ] Try with SSD Holder
- [ ] Try with fan module
- [ ] Try with bad interposer

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

README.md

@@ -181,6 +181,7 @@ Options:
       --inputmodules                Show status of the input modules (Framework 16 only)
       --input-deck-mode <INPUT_DECK_MODE>
           Set input deck power mode [possible values: auto, off, on] (Framework 16 only) [possible values: auto, off, on]
+      --expansion-bay               Show status of the expansion bay (Framework 16 only)
       --charge-limit [<CHARGE_LIMIT>]
           Get or set max charge limit
       --get-gpio <GET_GPIO>

framework_lib/src/commandline/clap_std.rs

@@ -147,6 +147,10 @@ struct ClapCli {
     #[arg(long)]
     input_deck_mode: Option<InputDeckModeArg>,
 
+    /// Show status of the expansion bay (Framework 16 only)
+    #[arg(long)]
+    expansion_bay: bool,
+
     /// Get or set max charge limit
     #[arg(long)]
     charge_limit: Option<Option<u8>>,
@@ -352,6 +356,7 @@ pub fn parse(args: &[String]) -> Cli {
         intrusion: args.intrusion,
         inputmodules: args.inputmodules,
         input_deck_mode: args.input_deck_mode,
+        expansion_bay: args.expansion_bay,
         charge_limit: args.charge_limit,
         get_gpio: args.get_gpio,
         fp_led_level: args.fp_led_level,

framework_lib/src/commandline/mod.rs

@@ -173,6 +173,7 @@ pub struct Cli {
     pub intrusion: bool,
     pub inputmodules: bool,
     pub input_deck_mode: Option<InputDeckModeArg>,
+    pub expansion_bay: bool,
     pub charge_limit: Option<Option<u8>>,
     pub get_gpio: Option<String>,
     pub fp_led_level: Option<Option<FpBrightnessArg>>,
@@ -761,6 +762,13 @@ pub fn run_with_args(args: &Cli, _allupdate: bool) -> i32 {
     } else if let Some(mode) = &args.input_deck_mode {
         println!("Set mode to: {:?}", mode);
         ec.set_input_deck_mode((*mode).into()).unwrap();
+    } else if args.expansion_bay {
+        println!("Expansion Bay");
+        if let Ok(sn) = ec.get_gpu_serial() {
+            println!("  Serial Number: {}", sn);
+        } else {
+            println!("  Serial Number: Unknown");
+        }
     } else if let Some(maybe_limit) = args.charge_limit {
         print_err(handle_charge_limit(&ec, maybe_limit));
     } else if let Some(gpio_name) = &args.get_gpio {
@@ -1080,6 +1088,7 @@ Options:
       --intrusion            Show status of intrusion switch
       --inputmodules         Show status of the input modules (Framework 16 only)
       --input-deck-mode      Set input deck power mode [possible values: auto, off, on] (Framework 16 only)
+      --expansion-bay        Show status of the expansion bay (Framework 16 only)
       --charge-limit [<VAL>] Get or set battery charge limit (Percentage number as arg, e.g. '100')
       --get-gpio <GET_GPIO>  Get GPIO value by name
       --fp-led-level [<VAL>] Get or set fingerprint LED brightness level [possible values: high, medium, low]

framework_lib/src/commandline/uefi.rs

@@ -86,6 +86,7 @@ pub fn parse(args: &[String]) -> Cli {
         intrusion: false,
         inputmodules: false,
         input_deck_mode: None,
+        expansion_bay: false,
         charge_limit: None,
         get_gpio: None,
         fp_led_level: None,
@@ -247,6 +248,9 @@ pub fn parse(args: &[String]) -> Cli {
                 None
             };
             found_an_option = true;
+        } else if arg == "--expansion-bay" {
+            cli.expansion_bay = true;
+            found_an_option = true;
         } else if arg == "--charge-limit" {
             cli.charge_limit = if args.len() > i + 1 {
                 if let Ok(percent) = args[i + 1].parse::<u8>() {