Track mentions of teams to which the user belongs

[MykytaPimonovTD]

Previously, the app tracked only user mentions by their name. However, GitHub also supports team mentions, which notify all team members.

This changeset adds support for tracking mentions of teams to which the user belongs.

Accessing an organization's team list, essential for verifying a user's team memberships, requires installing the GitHub app on the organization's account. Furthermore, mentions of teams belonging to organizations that have not installed the GitHub app are not displayed, even if the user is a member of those teams.

A team can be either visible or secret. Regardless of its visibility, the application accesses its mentions as long as it has permission to read the resource.

Note that mentions for teams in GitHub are cascading—mentioning a parent team automatically includes all members of its child teams. Pingh, however, does not support this functionality. A team's mention is only visible if the team itself is explicitly mentioned using its tag.

Several changes were made to the mention selection process:

• Mentions made by the user themselves are ignored.
• Duplicate mentions within the same item are removed. For instance, if two teams are mentioned in the same comment and the user is a member of both, the mention will be shown only once.

Additionally, the design of the Mentions page was updated:

The content of the notifications was also updated: