Endpoints uri's are not relative to the server>url

[vaidas-lungis]

Jane version(s) affected: v7.6.0

Description
All endpoint uri's are generated with / prefix (relative to the root), and it breaks OAS3.0 specification

All API endpoints are relative to the base URL

At the end final uri is generated by the RFC 3986, section 5.2

So it is impossible to have a server.url value with path in it. Only first two options are possible from the example.

Hence by the applying changes, 3rd and 4th option will be possible allowing more flexibility and following the OAS3.0 specification.

How to reproduce

openapi: 3.0.1
info:
  title: exmaple
  version: 1.0.0
servers:
  - url: https://server.localhost/api/v3
paths:
  /users:
    get:
      summary: Get users
      responses:
        '200':
          description: Successful operation
          content:
            application/json:
              {}          

Possible Solution
Trim leading / from path value.
Update Generator class Jane\Component\OpenApiCommon\Guesser\Guess\OperationGuess

$this->path = ltrim($path, '/');

Additional context