add workspace/folder/environment commands and reorganize cli tests

crates-cli/yaak-cli/README.md

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+# yaak-cli
+
+Command-line interface for Yaak.
+
+## Command Overview
+
+Current top-level commands:
+
+```text
+yaakcli send <request_id>
+yaakcli workspace list
+yaakcli workspace show <workspace_id>
+yaakcli workspace create --name <name>
+yaakcli workspace delete <workspace_id> [--yes]
+yaakcli request list <workspace_id>
+yaakcli request show <request_id>
+yaakcli request send <request_id>
+yaakcli request create <workspace_id> --name <name> --url <url> [--method GET]
+yaakcli request delete <request_id> [--yes]
+yaakcli folder list <workspace_id>
+yaakcli folder show <folder_id>
+yaakcli folder create <workspace_id> --name <name>
+yaakcli folder delete <folder_id> [--yes]
+yaakcli environment list <workspace_id>
+yaakcli environment show <environment_id>
+yaakcli environment create <workspace_id> --name <name>
+yaakcli environment delete <environment_id> [--yes]
+```
+
+Global options:
+
+- `--data-dir <path>`: use a custom data directory
+- `-e, --environment <id>`: environment to use during request rendering/sending
+- `-v, --verbose`: verbose logging and send output
+
+Notes:
+
+- `send` is currently a shortcut for sending an HTTP request ID.
+- `delete` commands prompt for confirmation unless `--yes` is provided.
+- In non-interactive mode, `delete` commands require `--yes`.
+
+## Examples
+
+```bash
+yaakcli workspace list
+yaakcli workspace create --name "My Workspace"
+yaakcli workspace show wk_abc
+yaakcli request list wk_abc
+yaakcli request show rq_abc
+yaakcli request create wk_abc --name "Users" --url "https://api.example.com/users"
+yaakcli request send rq_abc -e ev_abc
+yaakcli request delete rq_abc --yes
+yaakcli folder create wk_abc --name "Auth"
+yaakcli environment create wk_abc --name "Production"
+```
+
+## Roadmap
+
+Planned command expansion (JSON create/update, request schema, and polymorphic send) is tracked in `PLAN.md`.
+
+When command behavior changes, update this README and verify with:
+
+```bash
+cargo run -q -p yaak-cli -- --help
+cargo run -q -p yaak-cli -- request --help
+cargo run -q -p yaak-cli -- workspace --help
+cargo run -q -p yaak-cli -- folder --help
+cargo run -q -p yaak-cli -- environment --help
+```