trible: --version / -V (basic CLI hygiene)

`trible --version` rejected the flag entirely:

  $ trible --version
  error: unexpected argument '--version' found

That's a basic CLI hygiene gap — every `cargo install`-able tool
is expected to support `--version` and `-V` for sanity-checking
which build is on PATH, for bug reports, and for shell-level
version pinning checks. The clap derive opts in via a single
`#[command(version, ...)]` attribute on the parser.

  $ trible --version
  trible 0.36.0
  $ trible -V
  trible 0.36.0

Locked in basic.rs with a regex match on `trible \d+\.\d+\.\d+`
covering both flag forms.

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

Author: somethingelseentirely

trible/src/main.rs

@@ -13,6 +13,7 @@ use cli::store::StoreCommand;
 use cli::team::Command as TeamCommand;
 
 #[derive(Parser)]
+#[command(version, about, long_about = None)]
 /// A knowledge graph and meta file system for object stores.
 ///
 enum TribleCli {

trible/tests/basic.rs

@@ -20,3 +20,22 @@ fn completion_generates_script() {
         .success()
         .stdout(predicate::str::contains("_trible()"));
 }
+
+#[test]
+fn version_flag_prints_crate_version() {
+    // Both `--version` and `-V` flags work and print
+    // `trible <semver>` (clap's default --version format).
+    Command::cargo_bin("trible")
+        .unwrap()
+        .arg("--version")
+        .assert()
+        .success()
+        .stdout(predicate::str::is_match("^trible \\d+\\.\\d+\\.\\d+\\n$").unwrap());
+
+    Command::cargo_bin("trible")
+        .unwrap()
+        .arg("-V")
+        .assert()
+        .success()
+        .stdout(predicate::str::is_match("^trible \\d+\\.\\d+\\.\\d+\\n$").unwrap());
+}