Added prompt escape code expansion flag to echo, -p

Added non-formatted runtime to prompt escape codes

Added prompt escape code that expands to the output of a shell function

Reworked internal logic for termios control

src/prompt/readline/mod.rs

@@ -8,7 +8,6 @@ use vimode::{CmdReplay, ModeReport, ViInsert, ViMode, ViNormal, ViReplace, ViVis
 
 use crate::libsh::{
   error::{ShErr, ShErrKind, ShResult},
-  sys::sh_quit,
   term::{Style, Styled},
 };
 use crate::prelude::*;
@@ -95,7 +94,7 @@ impl Readline for FernVi {
       if cmd.verb().is_some_and(|v| v.1 == Verb::EndOfFile) {
         if self.editor.buffer.is_empty() {
           std::mem::drop(raw_mode_guard);
-          sh_quit(0);
+					return Err(ShErr::simple(ShErrKind::CleanExit(0), "exit"));
         } else {
           self.editor.buffer.clear();
           continue;

src/prompt/readline/term.rs

@@ -687,7 +687,7 @@ impl LineWriter for TermWriter {
     for _ in 0..rows_to_clear {
       self.buffer.push_str("\x1b[2K\x1b[A");
     }
-    self.buffer.push_str("\x1b[2K");
+    self.buffer.push_str("\x1b[2K\r"); // Clear line and return to column 0
     write_all(self.out, self.buffer.as_str())?;
     self.buffer.clear();
     Ok(())