Allow {@inheritdoc} and additional documentation

phpDocumentor support is similar to #45, also overriding parameter & return declarations. The layout is similar to the VS Code Intelephense version.

This code:

class A {
    /**
     * Parent method summary.
     *
     * Parent method long description.
     *
     * @param bool $input The input.
     *
     * @return bool
     */
    public function method($input = TRUE) {
        return $input;
    }
}

class B extends A {
    /**
     * {@inheritDoc}
     *
     * Child method additonal details.
     *
     * @param string $input The input.
     *
     * @return string
     */
    public function method($input = 'default') {
        return $input;
    }
}

Outputs:

Converting to new issue template