[WIP] Frontend work to implement multiple reactions (V2)

[mirie]

User Story (Who / What / Why)

As a user, I want the ability to leave multiple reactions on posts in order to have more options to express myself and engage with content on the platform.

As an admin, I want to choose the specific reaction options on my community to ensure they resonate with my community members.

Additional Context

We are going to take on this project in different phases:

• V1: The Forem must use defined set of hardcoded reactions
• V2: Admins can choose from a few different "sets" of predefined reactions
• V3: Admins can configure any reaction by uploading icons, a name, etc. (similar to Navigation Links)

Definition of Done for V2

Admin Area:

• Index page added to /admin/customization/reactions
• Admin can view the hardcoded reactions enabled on their community (consistent with V1 rollout below)

Post Index View: (When a post card shows up in a feed, profile page, etc.)

• Display appropriate "cluster" of reactions next to the # of reactions
  • IE, only show a certain emoji in that cluster if the post has received one of those reactions (stretch?)
• Highlight reactions if the user has added that reaction to the post (this is new to this area, but brings it in line with the reading list interaction from this context)

Post View:

• Add ability for user to add / remove their own reaction by interacting with the horizontal row of reactions above title (below author)

[github-actions]

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[anujbhavsar96]

Highlight reactions if the user has added that reaction to the post (this is new to this area, but brings it in line with the reading list interaction from this context)

This won't be possible with the current index page card structure and design. We should go ahead and treat this functionality the same as we have in a system where reaction+number serves the purpose of information only.

Also, highlighting a reactions user has reacted to the post would look like they can interact with that particular reaction, but that won't be the case because we don't allow reactions from the index page. So let's just treat this as information and show relevant cluster only.

Add ability for user to add / remove their own reaction by interacting with the horizontal row of reactions above title (below author

Same as V1. Check here