Too aggressive field name sanitization

[nikolaiser]

Describe the bug
When generating endpoints from OpenAPI schema, all vals in field names are removed, which affects valid names like value

To Reproduce

The following scala-cli script

//> using scala 2.13.12
//> using repository sonatype:snapshots
//> using dep dev.zio::zio-http-gen:3.0.0-RC4+41-2d267b56-SNAPSHOT
//> using dep dev.zio::zio-json-yaml:0.6.2

import zio.http.gen.openapi.EndpointGen
import zio.http.endpoint.openapi.OpenAPI
import zio.http.endpoint.openapi.JsonSchema
import zio.json.yaml._
import zio.schema.codec.JsonCodec
import zio.http.gen.scala.CodeGen
import java.nio.file.Paths

object Main {

  val openapiYaml = """
                      |openapi: 3.0.3
                      |info:
                      | title: Example
                      | description: Example API documentation
                      | version: 1.0.0
                      |paths:
                      | /foo:
                      |   post:
                      |     requestBody:
                      |       content:
                      |         application/json:
                      |           schema:
                      |             $ref: '#/components/schemas/Bar' 
                      |     responses:
                      |       '200':
                      |         description: Success
                      |
                      |components:
                      | schemas:
                      |   Bar:
                      |     type: object
                      |     properties:
                      |       value:
                      |         type: string
  """.stripMargin

  implicit val openapiDecoder = JsonCodec.jsonDecoder(OpenAPI.schema)

  def main(args: Array[String]) = {
    val openapi = openapiYaml.fromYaml[OpenAPI].toOption.get
    val files = EndpointGen.fromOpenAPI(openapi)
    CodeGen.writeFiles(
      files,
      Paths.get("./sanitization-output"),
      "foo.bar",
      None
    )
  }
}

Generates a file ./sanitization-output/component/Bar.scala

package foo.bar.component

import zio.schema._

case class Bar(
 ue: Option[String]
)
object Bar {


 implicit val codec: Schema[Bar] = DeriveSchema.gen[Bar]



}

Expected behaviour
Valid field names like value should not be changed

[jdegoes]

/bounty $50

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Attempt	Started (GMT+0)	Solution
🟢 @ekhov	Jan 18, 2024, 4:45:50 PM	#2634

[ekhov]

/attempt #2622

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