feat: Add support for @Params() decorator

[adityabmv]

In version 5.0.0, the OpenAPI generator did not parse or generate the JSONSchema defined on fields in class-validator classes used with the @Params() decorator. This caused issues when attempting to generate accurate OpenAPI specifications, as the schema for path parameters would be missing in the final output.

Basic tests have been added to verify the feature works as expected.

Example -

class ListUserParams {
  @IsMongoId()
  @IsString()
  @JSONSchema({
    description: 'ID of the user',
    example: '60d5ec49b3f1c8e4a8f8b8c1',
    type: 'string',
    format: 'Mongo ObjectId',
  })
  id: string;

  @IsString()
  @IsOptional()
  @JSONSchema({
    description: 'Name of the user',
    example: 'John Doe',
    type: 'string',
  })
  name: string;
}

Generated Spec

      {
        in: 'path',
        name: 'id',
        required: true,
        schema: {
          description: 'ID of the user',
          example: '60d5ec49b3f1c8e4a8f8b8c1',
          type: 'string',
          format: 'Mongo ObjectId',
          pattern: '^[0-9a-fA-F]{24}$',
        },
      },
      {
        in: 'path',
        name: 'name',
        required: false,
        schema: {
          description: 'Name of the user',
          example: 'John Doe',
          type: 'string',
        },
      },