feat: add attachments API

[AlexanderNovak]

Replace this text with a description of your proposed change.

JIRA Ticket

Squash Commit Guidelines

This is a reminder on how to format your sqaush commit message. Delete from your PR after noting below.

Message Header

The message header is a single line that contains succinct description of the change containing a type: subject. For example:

feat: add Foo API

Allowed Types

This describes the kind of change that this commit is providing:

• feat (when adding feature)
• fix (when performing a bug fix)
• docs (when adding or changing documentation)
• refactor (when doing non-breaking code refactoring)
• test (when adding missing tests)
• chore (when performing maintainance)

Subject Text

This is a very short description of the change.

• use imperative, present tense: “change” not “changed” nor “changes”
• no dot (.) at the end