Add stellar token set-authorized subcommand

[fnando]

What

Adds stellar token set-authorized, a SAC-admin write subcommand that authorizes or deauthorizes an account to hold and transact a token. --admin signs and authorizes the change, --account is the target, and --authorize <true|false> sets the state. Returns a JSON receipt with the tx hash.

Why

Part of #2620 (typed SEP-41 + SAC client), completing the SAC-admin group (mint/set-admin/clawback/set-authorized). A thin wrapper over contract invoke reusing args::invoke_by_position and args::not_deployed_error; the admin only authorizes and is not a set_authorized argument, so only [account, authorize] are passed positionally. set_authorized is part of the SAC StellarAssetInterface, not SEP-41. The happy-path test verifies the change behaviorally via the SAC's authorized getter.

Known limitations

Muxed (M…) source accounts are rejected with a clear error (same constraint as transfer, see #2645). Deauthorizing an existing trustline requires the issuer to have AUTH_REVOCABLE set — an asset-configuration prerequisite, not enforced by the command.

[Copilot]

Pull request overview

Adds the SAC-admin token set-authorized command.

Changes:

• Implements authorization updates with structured receipts and errors.
• Registers CLI routing, help documentation, and JSON handling.
• Adds integration coverage for success and error paths.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
FULL_HELP_DOCS.md	Documents the command and options.
cmd/soroban-cli/src/commands/token/set_authorized.rs	Implements the command.
cmd/soroban-cli/src/commands/token/mod.rs	Registers and dispatches the subcommand.
cmd/soroban-cli/src/cli.rs	Enables structured JSON errors.
cmd/crates/soroban-test/tests/it/integration/token/set_authorized.rs	Tests behavior and failures.
cmd/crates/soroban-test/tests/it/integration/token/mod.rs	Registers the integration tests.

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