chore(release): 0.3.0

Subcommand dispatch is now help-driven instead of substring-matching
"REVSET", so multi-level subcommands (`tag set`, `bookmark move`, …)
and non-`-r` revset flags (`--to`) work, and pre-supplied revset
flags bypass the picker instead of being double-injected.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "jjf"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2024"
 rust-version = "1.85"
 authors = ["Stephen Waits <steve@waits.net>"]