cli: rename --verbose to --debug to better fit what it does

CHANGELOG.md

@@ -53,6 +53,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 * `jj git fetch` now automatically prints new remote branches and tags by default.
 
+* `--verbose(-v)` is now `--debug` (no short option since it's not intended to be used often)
+
 ### Fixed bugs
 
 * On Windows, symlinks in the repo are now materialized as regular files in the

cli/src/cli_util.rs

@@ -2497,9 +2497,9 @@ pub struct GlobalArgs {
     /// do that, but it is possible.
     #[arg(long, visible_alias = "at-op", global = true, default_value = "@")]
     pub at_operation: String,
-    /// Enable verbose logging
-    #[arg(long, short = 'v', global = true)]
-    pub verbose: bool,
+    /// Enable debug logging
+    #[arg(long, global = true)]
+    pub debug: bool,
 
     #[command(flatten)]
     pub early_args: EarlyArgs,
@@ -2743,7 +2743,7 @@ pub fn parse_args(
         .try_get_matches_from(string_args)?;
 
     let args: Args = Args::from_arg_matches(&matches).unwrap();
-    if args.global_args.verbose {
+    if args.global_args.debug {
         // TODO: set up verbose logging as early as possible
         tracing_subscription.enable_verbose_logging()?;
     }

cli/tests/cli-reference@.md.snap

@@ -154,7 +154,7 @@ repository.
 * `--at-operation <AT_OPERATION>` — Operation to load the repo at
 
   Default value: `@`
-* `-v`, `--verbose` — Enable verbose logging
+* `--debug` — Enable debug logging
 
   Possible values: `true`, `false`