* Related to #1547: use `dioxus-cli` within a workspace
Although the `dx` CLI allows to specify a package name to chose from workspace members,
it does not support workspace members specified as glob-wildcards.
Neither it respects the effective package name, specified in the crate's `Cargo.toml`.
This PR addresses that issue:
- upon `dx build ...`, if the `--bin` CLI-argument is provided, treat the current dir as a workspace;
- search through the workspace's `members`: resolve each of them with `glob`;
- assume that any workspace member has a `Cargo.toml` in it (cargo does it, so it's okay);
- read said manifest, and check the package name in it;
- if found — there we have our sought package.
* Use cargo-metadata to find out the workspace structure
* glob is unused
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