Add --ext-params flag to copy command

[atimin]

Closes #102

Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• CHANGELOG.md has been updated (for bug fixes / features / docs)

What kind of change does this PR introduce?

Feature

What was changed?

The PR adds the --ext-params flag to the reduct -cli cp command to use extension during copy operations.
Additionally. renamed -T to -t shortcut for the --time argument of the remove command to avoid conflict with the -T (timeout).

Related issues

#102

Does this PR introduce a breaking change?

Yes

Other information:

[Copilot]

Pull Request Overview

Adds support for passing JSON-formatted extension parameters to the cp command, renames a conflicting flag in the rm command, and bumps related dependencies and CI configuration.

• Introduce --ext-params (-X) argument in shared CLI args, parse it into QueryParams, and wire it through cp’s query builder.
• Rename the remove command’s short flag from -T to -t to avoid a conflict with timeout.
• Update reduct-rs to v1.15.0 and switch CI workflow to use vars.MINIMAL_RUST_VERSION.

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/parse/widely_used_args.rs	Added make_ext_arg for the new --ext-params flag
src/parse/helpers.rs	Extended QueryParams and parsing logic to handle optional ext JSON
src/cmd/rm.rs	Renamed remove flag shortcut from -T to -t
src/cmd/rm/query_remover.rs	Updated test fixture to include new ext field
src/cmd/cp/helpers.rs	Wired query_builder.ext(...) when ext params are present
src/cmd/cp.rs	Added the make_ext_arg() to the cp subcommand
Cargo.toml	Bumped reduct-rs dependency from 1.14.0 to 1.15.0
.github/workflows/ci.yml	Switched Rust toolchain reference to use vars.MINIMAL_RUST_VERSION

Comments suppressed due to low confidence (2)

src/cmd/cp/helpers.rs:130

• Add unit or integration tests for the --ext-params flag to verify JSON parsing and confirm that QueryBuilder.ext(...) is invoked when this parameter is provided.

if let Some(ext) = &query_params.ext {

.github/workflows/ci.yml:69

• Ensure MINIMAL_RUST_VERSION is defined under vars in your repository’s settings or in the workflow; otherwise the CI job will fail to resolve the toolchain.

toolchain: ${{ vars.MINIMAL_RUST_VERSION }}