Refactor CLI, add refresh command, fix port detection, add device tracking

- Remove build/upload/monitor subcommands (projects are self-contained)
- Remove ctrlc dependency (only used by removed monitor watch mode)
- Update next-steps messaging to reference project scripts directly

- Add 'anvil refresh [DIR] [--force]' to update project scripts
  to latest templates without touching user code

- Fix Windows port detection: replace fragile findstr/batch TOML
  parsing with proper comment-skipping logic; add _detect_port.ps1
  helper for reliable JSON-based port detection via PowerShell

- Add .anvil.local for machine-specific config (gitignored)
  - 'anvil devices --set [PORT] [-d DIR]' saves port + VID:PID
  - 'anvil devices --get [-d DIR]' shows saved port status
  - VID:PID tracks USB devices across COM port reassignment
  - Port resolution: -p flag > VID:PID > saved port > auto-detect
  - Uppercase normalization for Windows COM port names

- Update all .bat/.sh templates to read from .anvil.local
- Remove port entries from .anvil.toml (no machine-specific config in git)
- Add .anvil.local to .gitignore template
- Expand 'anvil devices' output with VID:PID, serial number, and
  usage instructions

src/main.rs

@@ -43,73 +43,31 @@ enum Commands {
     Setup,
 
     /// List connected boards and serial ports
-    Devices,
+    Devices {
+        /// Save a port to .anvil.local for this project
+        #[arg(long, conflicts_with = "get")]
+        set: bool,
 
-    /// Compile a sketch (and optionally upload)
-    Build {
-        /// Path to sketch directory
-        sketch: String,
+        /// Show the saved port for this project
+        #[arg(long, conflicts_with = "set")]
+        get: bool,
 
-        /// Compile only -- do not upload
-        #[arg(long)]
-        verify: bool,
+        /// Port name (e.g. COM3, /dev/ttyUSB0). Auto-detects if omitted with --set.
+        port_or_dir: Option<String>,
 
-        /// Open serial monitor after upload
-        #[arg(long)]
-        monitor: bool,
-
-        /// Delete cached build artifacts first
-        #[arg(long)]
-        clean: bool,
-
-        /// Show full compiler output
-        #[arg(long)]
-        verbose: bool,
-
-        /// Serial port (auto-detected if omitted)
-        #[arg(short, long)]
-        port: Option<String>,
-
-        /// Serial monitor baud rate
-        #[arg(short, long)]
-        baud: Option<u32>,
-
-        /// Override Fully Qualified Board Name
-        #[arg(long)]
-        fqbn: Option<String>,
+        /// Path to project directory (defaults to current directory)
+        #[arg(long, short = 'd', value_name = "DIR")]
+        dir: Option<String>,
     },
 
-    /// Upload cached build artifacts (no recompile)
-    Upload {
-        /// Path to sketch directory
-        sketch: String,
+    /// Update project scripts to the latest version
+    Refresh {
+        /// Path to project directory (defaults to current directory)
+        dir: Option<String>,
 
-        /// Serial port (auto-detected if omitted)
-        #[arg(short, long)]
-        port: Option<String>,
-
-        /// Show full avrdude output
+        /// Overwrite scripts even if they have been modified
         #[arg(long)]
-        verbose: bool,
-
-        /// Override Fully Qualified Board Name
-        #[arg(long)]
-        fqbn: Option<String>,
-    },
-
-    /// Open serial monitor
-    Monitor {
-        /// Serial port (auto-detected if omitted)
-        #[arg(short, long)]
-        port: Option<String>,
-
-        /// Baud rate (default: from project config or 115200)
-        #[arg(short, long)]
-        baud: Option<u32>,
-
-        /// Persistent mode: reconnect after upload/reset/replug
-        #[arg(long)]
-        watch: bool,
+        force: bool,
     },
 }
 
@@ -133,7 +91,7 @@ fn main() -> Result<()> {
             } else {
                 anyhow::bail!(
                     "Project name required.\n\
-                     Usage: anvil new <name>\n\
+                     Usage: anvil new <n>\n\
                      List templates: anvil new --list-templates"
                 );
             }
@@ -144,31 +102,24 @@ fn main() -> Result<()> {
         Commands::Setup => {
             commands::setup::run_setup()
         }
-        Commands::Devices => {
-            commands::devices::scan_devices()
+        Commands::Devices { set, get, port_or_dir, dir } => {
+            if set {
+                commands::devices::set_port(
+                    port_or_dir.as_deref(),
+                    dir.as_deref(),
+                )
+            } else if get {
+                commands::devices::get_port(
+                    dir.as_deref().or(port_or_dir.as_deref()),
+                )
+            } else {
+                commands::devices::scan_devices()
+            }
         }
-        Commands::Build {
-            sketch, verify, monitor, clean, verbose,
-            port, baud, fqbn,
-        } => {
-            commands::build::run_build(
-                &sketch, verify, monitor, clean, verbose,
-                port.as_deref(), baud, fqbn.as_deref(),
-            )
-        }
-        Commands::Upload { sketch, port, verbose, fqbn } => {
-            commands::build::run_upload_only(
-                &sketch,
-                port.as_deref(),
-                verbose,
-                fqbn.as_deref(),
-            )
-        }
-        Commands::Monitor { port, baud, watch } => {
-            commands::monitor::run_monitor(
-                port.as_deref(),
-                baud,
-                watch,
+        Commands::Refresh { dir, force } => {
+            commands::refresh::run_refresh(
+                dir.as_deref(),
+                force,
             )
         }
     }
@@ -193,4 +144,4 @@ fn print_banner() {
             .bright_cyan()
     );
     println!();
-}
+}