Add version constraint examples to wp package install help (#234)

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: Copilot

src/Package_Command.php

@@ -208,9 +208,21 @@ public function browse( $_, $assoc_args ) {
 	 *     # Install the latest stable version of a package.
 	 *     $ wp package install runcommand/hook
 	 *
+	 *     # Install a specific version.
+	 *     $ wp package install wp-cli/server-command:2.0.0
+	 *
+	 *     # Install with caret operator (allows non-breaking updates).
+	 *     $ wp package install wp-cli/server-command:^1.0
+	 *
+	 *     # Install with tilde operator (allows patch-level updates).
+	 *     $ wp package install wp-cli/server-command:~1.2
+	 *
 	 *     # Install the latest stable version (explicitly specified).
 	 *     $ wp package install wp-cli/server-command:@stable
 	 *
+	 *     # Install from a development branch.
+	 *     $ wp package install wp-cli/server-command:dev-main
+	 *
 	 *     # Install a package hosted at a GitLab.com URL.
 	 *     $ wp package install https://gitlab.com/foo/wp-cli-bar-command.git
 	 *