Allow to specify 'project-conf' for pio init

[gohm44]

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Configuration

Operating system: All

PlatformIO Version (platformio --version): PlatformIO Core, version 6.1.7

Description of problem

I would like to be able to specify project-conf option for pio init similar as is for project run. For my current develop environment, I'm using separated ini files to define PlatformIO environments. pio run --project-conf projects/my_ini_file.ini -e my_environment

Steps to Reproduce

1. pio project init --ide vim -e my_environment --project-conf projects/my_ini_file.ini

Actual Results

Error: No such option: --project-options (Possible options: --project-dir, --project-option)

Expected Results

Updating metadata for the vim IDE... Project has been successfully updated!