refactor(bar) split komorebi widget into smaller parts

This PR significantly refactors the komorebi  bar rendering logic,
simplifying state management, and addressing some found bugs. The
primary motivation was to make the codebase more readable and
maintainable.

Key Changes:

- Allocation Reduction: Removed most per-frame structure allocations.

- Runtime Matching Elimination: Replaced runtime pattern matching with
  pre-selected function pointers determined at initialization. Widget
  validations and configurations are now performed during widget
  creation rather than per-frame checks. For example, widget enablement
  is now handled by an Option that wraps each ..Bar structure. If a
  widget is enabled, its structure is present; otherwise, it is None.
  This eliminates the need for runtime enabled checks.

- Widget Modularity: Code is split into smaller parts, reducing
  complexity.

Bug Fixes:

- Corrected icon sizing for floating windows following regular
  containers, ensuring icons revert correctly from icon_size to
  text_size.

- There was also another bug with a floating window positioned above a
  monocle container, but I forgot the details 😅

komorebi-client/src/lib.rs

@@ -77,6 +77,7 @@ pub use komorebi::WorkspaceConfig;
 
 use komorebi::DATA_DIR;
 
+use std::borrow::Borrow;
 use std::io::BufReader;
 use std::io::Read;
 use std::io::Write;
@@ -94,12 +95,15 @@ pub fn send_message(message: &SocketMessage) -> std::io::Result<()> {
     stream.write_all(serde_json::to_string(message)?.as_bytes())
 }
 
-pub fn send_batch(messages: impl IntoIterator<Item = SocketMessage>) -> std::io::Result<()> {
+pub fn send_batch<Q>(messages: impl IntoIterator<Item = Q>) -> std::io::Result<()>
+where
+    Q: Borrow<SocketMessage>,
+{
     let socket = DATA_DIR.join(KOMOREBI);
     let mut stream = UnixStream::connect(socket)?;
     stream.set_write_timeout(Some(Duration::from_secs(1)))?;
     let msgs = messages.into_iter().fold(String::new(), |mut s, m| {
-        if let Ok(m_str) = serde_json::to_string(&m) {
+        if let Ok(m_str) = serde_json::to_string(m.borrow()) {
             s.push_str(&m_str);
             s.push('\n');
         }