Added GetShortInterest and ListIPOs support

[justinpolygon]

Update client with Short Interest and IPOs support. This PR adds GetShortInterest and ListIPOs functions, params, responses, tests, and a working examples.

Short Interest

// Stocks - Short Interest
// https://polygon.io/docs/stocks/get_v1_reference_short-interest__identifierType___identifier
package main

import (
	"context"
	"log"
	"os"
	"time"

	polygon "github.com/polygon-io/client-go/rest"
	"github.com/polygon-io/client-go/rest/models"
)

func main() {

	// Initialize client
	c := polygon.New(os.Getenv("POLYGON_API_KEY"))

	// Set parameters
	params := models.ListShortInterestParams{
		IdentifierType: "ticker",
		Identifier:     "AMD",
	}.WithDay(models.GTE, 2024, time.October, 1).
		WithDay(models.LTE, 2024, time.October, 10).
		WithLimit(10)

	// Make request
	iter := c.ListShortInterest(context.Background(), params)

	// Do something with the result
	for iter.Next() {
		log.Print(iter.Item())
	}
	if iter.Err() != nil {
		log.Fatal(iter.Err())
	}

}

$ go run rest/example/stocks/short-interest/main.go
2024/10/10 23:07:38 {USD 2024-10-01 US0079031078 Advanced Micro Devices Inc. Ordinary Shares 7557448 32411 AMD 007903107}
2024/10/10 23:07:38 {USD 2024-10-02 US0079031078 Advanced Micro Devices Inc. Ordinary Shares 5921961 20324 AMD 007903107}
2024/10/10 23:07:38 {USD 2024-10-03 US0079031078 Advanced Micro Devices Inc. Ordinary Shares 6591389 29014 AMD 007903107}
2024/10/10 23:07:38 {USD 2024-10-04 US0079031078 Advanced Micro Devices Inc. Ordinary Shares 10902497 61664 AMD 007903107}
2024/10/10 23:07:38 {USD 2024-10-07 US0079031078 Advanced Micro Devices Inc. Ordinary Shares 9180696 48277 AMD 007903107}
2024/10/10 23:07:38 {USD 2024-10-08 US0079031078 Advanced Micro Devices Inc. Ordinary Shares 9587451 56876 AMD 007903107}

Company IPOs

// Stocks - Company IPOs
// https://polygon.io/docs/stocks/get_v1_reference_ipos
package main

import (
	"context"
	"log"
	"os"

	polygon "github.com/polygon-io/client-go/rest"
	"github.com/polygon-io/client-go/rest/models"
)

func main() {

	// Initialize client
	c := polygon.New(os.Getenv("POLYGON_API_KEY"))

	// Set parameters
	params := models.ListIPOsParams{}.WithTicker("RDDT")

	// make request
	iter := c.ListIPOs(context.Background(), params)

	// do something with the result
	for iter.Next() {
		log.Print(iter.Item())
	}
	if iter.Err() != nil {
		log.Fatal(iter.Err())
	}

}

$ go run rest/example/stocks/ipos/main.go
2024/10/10 23:07:03 {USD 34 34 history US75734B1008   Reddit Inc. 2024-03-26 2024-03-21 0 0 31 22000000 0 XNYS Ordinary Shares - Class A CS 36871367 RDDT 5.19401918e+08 75734B100}

[aitzkovitz]

we actually added an ipo_status param so users can filter by ipo_status as well