Fix feature used for plugin starter.

[DanielSidhion]

Description:

New plugins created with swc plugin new can't be compiled because the feature plugin_transform used by the plugin was recently removed (in fa8f7b0). This leads to errors like the following:

error: failed to select a version for `swc_core`.
    ... required by package `swc_plugin v0.1.0 (<redacted path>)`
versions that meet the requirements `0.50.*` are: 0.50.3, 0.50.2, 0.50.1, 0.50.0

the package `swc_plugin` depends on `swc_core`, with features: `plugin_transform` but `swc_core` does not have these features.


failed to select a version for `swc_core` which could resolve this conflict

This PR updates the template used for new plugins to depend on a proper feature name. I'm assuming it's supposed to be ecma_plugin_transform by default, but that is likely not applicable for all types of plugins and might need more work in the future. For now, this change fixes a currently-broken workflow for people new to the project.

[CLAassistant]

All committers have signed the CLA.

[kdy1]

Thanks!

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swc-bump:

• dbg-swc

[lishoulong]

Hi, I just find the default version swc_cli v0.91.11 still use plugin_transform as dependency.
We should change plugin_transform to ecma_plugin_transform.