init(models): initialize models

also add .gitignore

.gitignore

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+bin/
+.vscode/
+.stfolder/

internal/models/models.go

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+package models
+
+import (
+	"database/sql"
+	"time"
+)
+
+type Person struct {
+	ID        string         `json:"id"`
+	Name      string         `json:"name"`
+	Birthdate time.Time      `json:"birthdate"`
+	Deathdate sql.NullTime   `json:"deathdate"`
+	Info      sql.NullString `json:"info"`
+}
+
+type Role struct {
+	ID   string `json:"id"`
+	Name string `json:"name"`
+}
+
+type Credit struct {
+	Person Person `json:"person"`
+	Role   Role   `json:"role"`
+}
+
+type Artist struct {
+	ID    string         `json:"id"`
+	Name  string         `json:"name"`
+	Notes sql.NullString `json:"notes"`
+}
+
+type Track struct {
+	ID          string         `json:"id"`
+	Name        string         `json:"name"`
+	Artists     []Artist       `json:"artists"`
+	ReleaseDate sql.NullTime   `json:"release_date"`
+	AcquireDate time.Time      `json:"acquire_date"`
+	ISRC        sql.NullString `json:"isrc"`
+	Credits     []Credit       `json:"credits"`
+	Notes       sql.NullString `json:"notes"`
+}