Create a frontend wireframe. (#7)

Sets up API methods and types.
Sets up a colorscheme.
Sets up a homepage.

Removes tailwind in favor of mui for now.

Reviewed-on: #7
Co-authored-by: Drew Galbraith <drew@tiramisu.one>
Co-committed-by: Drew Galbraith <drew@tiramisu.one>

frontend/app/types/task.ts

@@ -0,0 +1,35 @@
+export enum TaskStatus {
+  Todo = 'todo',
+  Done = 'done',
+  Backlog = 'backlog',
+}
+
+export interface Task {
+  id: string
+  title: string
+  description: string | null
+  status: TaskStatus
+  created_at: string
+  updated_at: string
+  completed_at: string | null
+}
+
+export interface CreateTaskRequest {
+  title: string
+  description?: string
+}
+
+export interface UpdateTaskRequest {
+  title?: string
+  description?: string
+  status?: TaskStatus
+}
+
+export interface ApiError {
+  message: string
+  status?: number
+}
+
+export interface TaskListResponse {
+  tasks: Task[]
+}