jellyseerr: start API client

Currently uses an API key (Seems simpler for the user than importing the
jfa-go user and granting perms). Strategy as follows:
* MustGetUser(jfID) function checks the cache for user, if not, calls
  Jellyseerr's importer passing jfID. From either, the user object is
  returned, which (in later commits) can be used to update the user's
  email (and potentially other info).

My API key is in there rn but its for a local testing instance, who
cares.

jellyseerr/models.go

@@ -0,0 +1,41 @@
+package jellyseerr
+
+import "time"
+
+type User struct {
+	Permissions                int       `json:"permissions"`
+	Warnings                   []any     `json:"warnings"`
+	ID                         int       `json:"id"`
+	Email                      string    `json:"email"`
+	PlexUsername               string    `json:"plexUsername"`
+	JellyfinUsername           string    `json:"jellyfinUsername"`
+	Username                   string    `json:"username"`
+	RecoveryLinkExpirationDate any       `json:"recoveryLinkExpirationDate"`
+	UserType                   int       `json:"userType"`
+	PlexID                     string    `json:"plexId"`
+	JellyfinUserID             string    `json:"jellyfinUserId"`
+	JellyfinDeviceID           string    `json:"jellyfinDeviceId"`
+	JellyfinAuthToken          string    `json:"jellyfinAuthToken"`
+	PlexToken                  string    `json:"plexToken"`
+	Avatar                     string    `json:"avatar"`
+	MovieQuotaLimit            any       `json:"movieQuotaLimit"`
+	MovieQuotaDays             any       `json:"movieQuotaDays"`
+	TvQuotaLimit               any       `json:"tvQuotaLimit"`
+	TvQuotaDays                any       `json:"tvQuotaDays"`
+	CreatedAt                  time.Time `json:"createdAt"`
+	UpdatedAt                  time.Time `json:"updatedAt"`
+	RequestCount               int       `json:"requestCount"`
+	DisplayName                string    `json:"displayName"`
+}
+
+type PageInfo struct {
+	Pages    int `json:"pages"`
+	PageSize int `json:"pageSize"`
+	Results  int `json:"results"`
+	Page     int `json:"page"`
+}
+
+type GetUsersDTO struct {
+	Page    PageInfo `json:"pageInfo"`
+	Results []User   `json:"results"`
+}