XiaoW Hotfix of Project refactor and white screen issue fix

[wang9hu]

Description

This PR along with its complementary backend PR addresses three main things

1. Refactor the Project component, mainly convert it from class component to functional component
2. Change Project Delete functionality to Archive, which makes the data retrievable if deleted accidentally.
3. Fix the white screen issue of Timelog, TimeEntryForm pages that is caused by undefined wbs or project.

Additionaly, this PR removes the unused component Admin and its relative files.

Related PRS (if any):

This frontend PR is related to the #980 backend PR.
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Main changes explained:

• Change and refactor Project component from class component to functional component
• Implement project archive functionality to replace the project deletion functionality
• Make TimeEntry project/task options to use data from timeentry request to show Project name and task name instead of project/task state
• Make Timelog project/task options to use data from task request to show Project name and task name instead of project state