feat(contexts): add GuildMember

contexts/GuildMember.tsx

@@ -0,0 +1,32 @@
+import { createContext, useContext } from 'react'
+
+import { Guild } from 'models/Guild'
+import { Member } from 'models/Member'
+
+export interface GuildMember {
+  guild: Guild
+  member: Member
+}
+
+export interface GuildMemberProps {
+  guildMember: GuildMember
+}
+
+const defaultGuildMemberContext = {} as any
+const GuildMemberContext = createContext<GuildMember>(defaultGuildMemberContext)
+
+export const GuildMemberProvider: React.FC<GuildMemberProps> = (props) => {
+  return (
+    <GuildMemberContext.Provider value={props.guildMember}>
+      {props.children}
+    </GuildMemberContext.Provider>
+  )
+}
+
+export const useGuildMember = (): GuildMember => {
+  const guildMember = useContext(GuildMemberContext)
+  if (guildMember === defaultGuildMemberContext) {
+    throw new Error('useGuildMember must be used within GuildMemberProvider')
+  }
+  return guildMember
+}