new: add pkh put, a native dput replacement for PPA uploads

Upload built source packages over SFTP with host-key verification
(Launchpad fingerprints pinned in host_keys.yml, ask-to-accept
otherwise), Launchpad account discovery (git config lp.user), and
pre-flight checks the upload queue itself never does: changes file
discovery/validation, PPA existence via the Launchpad API, target
series validity, and debian/control Section validity (sections
bundled in distro_info.yml). Upload log prevents duplicate uploads
unless --force.

src/ui.rs

@@ -31,6 +31,24 @@ pub fn display_path(path: &Path) -> String {
     path.display().to_string()
 }
 
+/// Style of an unsized operation: spinner and prefix on one line
+pub(crate) fn spinner_style() -> ProgressStyle {
+    ProgressStyle::default_bar()
+        .template("> {spinner:.blue} {prefix}")
+        .unwrap()
+}
+
+/// Style of a sized transfer: prefix on the first line, the bar on its own
+/// indented line below so long prefixes cannot push it out of the terminal
+pub(crate) fn transfer_style() -> ProgressStyle {
+    ProgressStyle::default_bar()
+        .template(
+            "> {spinner:.blue} {prefix}\n      {msg} [{bar:40.cyan/blue}] {pos}/{len} ({eta})",
+        )
+        .unwrap()
+        .progress_chars("=> ")
+}
+
 /// Create a spinner-style progress bar attached to `multi`, returning the bar
 /// and a callback compatible with [`crate::ProgressCallback`]
 pub fn create_progress_bar(
@@ -38,26 +56,15 @@ pub fn create_progress_bar(
 ) -> (ProgressBar, impl Fn(&str, &str, usize, usize) + '_) {
     let pb = multi.add(ProgressBar::new(0));
     pb.enable_steady_tick(Duration::from_millis(50));
-    pb.set_style(
-        ProgressStyle::default_bar()
-            .template("> {spinner:.blue} {prefix}")
-            .unwrap(),
-    );
+    pb.set_style(spinner_style());
 
     let pb_clone = pb.clone();
     let callback = move |prefix: &str, msg: &str, progress: usize, total: usize| {
         let pb = &pb_clone;
         if progress != 0 && total != 0 {
-            pb.set_style(ProgressStyle::default_bar()
-                .template("> {spinner:.blue} {prefix}\n      {msg} [{bar:40.cyan/blue}] {pos}/{len} ({eta})")
-                .unwrap()
-                .progress_chars("=> "));
+            pb.set_style(transfer_style());
         } else {
-            pb.set_style(
-                ProgressStyle::default_bar()
-                    .template("> {spinner:.blue} {prefix}")
-                    .unwrap(),
-            );
+            pb.set_style(spinner_style());
         }
 
         if !prefix.is_empty() {