Add session-owned Pomodoro cycles and controls

Add configurable work and break intervals, pause/resume, CLI and activity-popup controls, and silent completion alerts. Use CLOCK_BOOTTIME deadlines so running timers include suspend without consuming paused time.

Refs #31

feresectl/src/pomodoro.rs

@@ -0,0 +1,42 @@
+use clap::Subcommand;
+use ferese_ipc::activities::{PomodoroAction, PomodoroRequest, VERSION};
+use std::{error::Error, os::unix::net::UnixStream, path::Path, time::Duration};
+
+#[derive(Debug, Subcommand)]
+pub enum Action {
+    /// Start a session using activities.pomodoro settings.
+    Start,
+    Pause,
+    Resume,
+    /// Skip the current interval, or start a phase that is ready.
+    Next,
+    /// Cancel and remove the session without a completion alert.
+    Stop,
+    /// Cancel and start a new session with current settings.
+    Reset,
+    Status,
+}
+pub fn command(action: &Action, socket: &Path, json: bool) -> Result<(), Box<dyn Error>> {
+    let action = match action {
+        Action::Start => PomodoroAction::Start,
+        Action::Pause => PomodoroAction::Pause,
+        Action::Resume => PomodoroAction::Resume,
+        Action::Next => PomodoroAction::Next,
+        Action::Stop => PomodoroAction::Stop,
+        Action::Reset => PomodoroAction::Reset,
+        Action::Status => PomodoroAction::Status,
+    };
+    let mut stream = UnixStream::connect(socket)?;
+    stream.set_read_timeout(Some(Duration::from_secs(2)))?;
+    stream.set_write_timeout(Some(Duration::from_secs(2)))?;
+    let result = super::request(
+        &mut stream,
+        "pomodoro",
+        serde_json::to_value(PomodoroRequest {
+            version: VERSION,
+            action,
+            session: None,
+        })?,
+    )?;
+    super::output::print(&result, json)
+}