fix: derive project machine name from git remote when argument is omitted

[mglaman]

What changed

• ProjectCommandBase::initialize() now checks the value of the project argument instead of whether the argument exists, so the git remote fallback actually runs when the argument is omitted.
• The remote URL parsing moved out of the command into mglaman\DrupalOrg\ProjectRemote::tryParse(), a small value object that returns null for anything that is not a project/ remote on git.drupal.org or git.drupalcode.org. It handles git@host:project/name.git, ssh://, https://, and .git-less forms.
• When no project can be derived, the CLI now says Could not determine the project from the git remote; pass the machine name as an argument. instead of Project not found.
• git config --get remote.origin.url runs as an argv array rather than (array) 'git config ...', which passed the whole string as a single argument.

Why

Closes #346.

InputInterface::hasArgument() reports whether the argument is defined on the command, not whether the user passed it. For every project:* command it is always true, so this branch never ran and getArgument('project') ?? '' produced an empty name:

if (!$this->stdIn->hasArgument('project')) {
    $this->projectName = $this->getProjectFromRemote();
    // ...
} else {
    $projectName = $this->stdIn->getArgument('project') ?? '';

The regex itself was not the cause, but it also required a .git suffix and matched any host, so the parser was rewritten while making it testable.

Testing

vendor/bin/phpcs src tests, vendor/bin/phpstan analyse src, and vendor/bin/phpunit (179 tests, 558 assertions) pass. tests/src/ProjectRemoteTest.php covers the SSH, ssh://, HTTPS, and .git-less forms plus GitHub, issue fork, and empty remotes returning null.

Reproduction in a throwaway repo with origin set to git@git.drupal.org:project/json_form_widget.git:

Before:

$ drupalorg project:issues
Project  not found.

After:

$ drupalorg project:issues -vv
Argument project not provided. Trying to get it from the remote URL of the current repository.
Project uses GitLab work items (no Drupal.org issue queue).
json_form_widget
+----------+--------+---...

Same result with https://git.drupalcode.org/project/json_form_widget.git and https://git.drupalcode.org/project/json_form_widget. With origin set to git@github.com:mglaman/drupalorg-cli.git:

Could not determine the project from the git remote; pass the machine name as an argument.

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