feat(rs/cli/program_new): add dependency inheritance from workspace

[StackOverflowExcept1on]

--app seems useless and complicates the implementation, so I removed it. Perhaps we could consider --eth, --client, --no-client.

[gemini-code-assist]

Summary of Changes

Hello @StackOverflowExcept1on, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refactors the program_new command in the Rust CLI to streamline the creation of new projects. It removes the previous option to generate only an application package, standardizing the output to a full workspace structure. A key enhancement is the implementation of workspace-level dependency management, where newly generated sub-crates are automatically configured as workspace members, and common dependencies like sails-rs and tokio are defined at the workspace root.

Highlights

• Workspace Dependency Inheritance: The program_new command now automatically configures newly generated app and client crates as workspace dependencies within the root Cargo.toml. This includes removing redundant package metadata from sub-crates and adding a descriptive entry.
• Removal of --app Flag: The --app flag, which previously allowed generating only an application package, has been removed. The program_new command now consistently generates a full workspace structure including root, app, client, build, and test packages.
• Standardized Dependency Management: Common dependencies like sails-rs and tokio are now managed at the workspace level in the root Cargo.toml, simplifying dependency declarations across the project.

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[gemini-code-assist]

Code Review

This pull request refactors the program_new command to consistently generate a workspace structure, leveraging dependency inheritance. This is a good simplification, removing the --app flag and its associated conditional logic. However, there is a critical issue where the generated workspace's Cargo.toml does not have its members field populated, which will cause cargo commands to fail. I've provided a suggestion to fix this. Additionally, I've noted a medium-severity issue regarding a hardcoded dependency version.

[vobradovich]

got error on windows

error: could not parse override file: 'E:\my-demo2\rust-toolchain.toml': error parsing override file: TOML parse error at line 4, column 1
  |
4 |
  | ^

fixed with

[toolchain]
channel = "stable"
targets = ["wasm32-unknown-unknown", "wasm32v1-none"]
{{- "\n" -}}

[StackOverflowExcept1on]

@vobradovich I had problem where I needed to add \n\n to the .askama files because for some reason this template engine ignored just one \n so the last line would be empty

[vobradovich]

@vobradovich I had problem where I needed to add \n\n to the .askama files because for some reason this template engine ignored just one \n so the last line would be empty

{{- "\n" -}}

works on both Windows and Linux