Drop experimental xattr command

[google-labs-jules]

This submission removes the experimental xattr command and updates the relevant tests.

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PR created automatically by Jules for task 10243690787573832889 started by @ChanTsune

Summary by CodeRabbit

• Changes
  • Xattr commands are now stable and no longer require the "experimental" prefix. Users can invoke xattr operations directly without the experimental subcommand token.

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Walkthrough

The changes remove the "experimental" subcommand designation from the xattr functionality, graduating it from experimental status to a standard CLI command. This involves removing the Xattr variant from the ExperimentalCommands enum and updating all related test invocations to call xattr commands without the "experimental" prefix.

Changes

Cohort / File(s)	Summary
Command dispatch removal cli/src/command/experimental.rs	Removed Xattr(command::xattr::XattrCommand) variant from ExperimentalCommands enum and removed corresponding match arm in Command::execute
Test updates cli/tests/cli/xattr/dump.rs, cli/tests/cli/xattr/get.rs, cli/tests/cli/xattr/missing_file.rs, cli/tests/cli/xattr/remove.rs, cli/tests/cli/xattr/restore.rs, cli/tests/cli/xattr/set.rs, cli/tests/cli/xattr/set_and_remove.rs, cli/tests/cli/xattr/set_base64.rs, cli/tests/cli/xattr/set_hex.rs, cli/tests/cli/xattr/set_overwrite.rs	Removed "experimental" argument from CLI invocations, allowing xattr commands to be called directly without the experimental prefix

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

• Changes are homogeneous and follow a consistent pattern across all test files
• Single enum variant removal with corresponding match arm deletion
• Straightforward argument removal with no logic changes

Suggested labels

cli

Poem

🐰 The xattr hops free from its experimental pen,
No longer "experimental" prefixed, time and again!
From unstable grounds it now stands tall and true,
A feature full-fledged—our fuzzy CLI crew!
hops rejoicefully ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title directly describes the main change: removing the experimental xattr command from the codebase.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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[ChanTsune]

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