Implement mastodon API endpoints

[yabirgb]

To make it compatible with other mastodon apps:

Accounts

• [ ] GET /api/v1/accounts/:id
• [ ] GET /api/v1/accounts/:id/followers // It's implemented for AP so it's just the same
• [ ] GET /api/v1/accounts/:id/following
• [ ] POST /api/v1/accounts/:id/block
• [ ] POST /api/v1/accounts/:id/unblock
• [ ] POST /api/v1/accounts/:id/mute
• [ ] GET /api/v1/accounts/relationships
• [ ] GET /api/v1/accounts/search
• [ ] PATCH /api/v1/accounts/update_credentials

Media

• [ ] POST /api/v1/media
• [ ] PUT /api/v1/media/:id

Apps

• [ ] POST /api/v1/apps

Likes

• [ ] GET /api/v1/favourites

Follow Request

• [ ] GET /api/v1/follow_requests

Follow

• [ ] POST /api/v1/follows Done but #22

Instance

• [ ] GET /api/v1/instance Need to be pushed