[gobby-cli-#123] fix(gcode): Use match guard for clippy 1.95 collapsible_match

crates/gcode/src/commands/init.rs:34 trips clippy::collapsible_match
on a nested `match Err(e) => { if !quiet { ... } }`. Convert to a
match guard `Err(e) if !quiet => { ... }`; the `_ => {}` arm catches
the quiet=true case as before, so behavior is preserved.

Updated local toolchain to 1.95 (was 1.94) so all 1.95 lints fire
locally going forward. Verified all five CI clippy commands pass on
1.95: gobby-core, gobby-hooks, gobby-squeeze, gobby-local,
gobby-code (no embeddings). Rolls into unreleased gcode 0.6.0 -- no
version bump.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: joshwilhelmi

crates/gcode/src/commands/init.rs

@@ -30,10 +30,8 @@ pub fn run(project_root: &Path, format: Format, quiet: bool) -> anyhow::Result<(
                     }
                     installed_skills.push(cli.name.to_string());
                 }
-                Err(e) => {
-                    if !quiet {
-                        eprintln!("Warning: failed to install skill for {}: {}", cli.name, e);
-                    }
+                Err(e) if !quiet => {
+                    eprintln!("Warning: failed to install skill for {}: {}", cli.name, e);
                 }
                 _ => {}
             }