Add request review functionality to card

[kingraphaii]

Related issues: [please specify]

Description:

This PR adds the "request review" button along with a minimal "alert" api for cards.

Screenshots/videos

I solemnly swear that:

• [x] My code follows the style guidelines of this project
• [x] I have merged the develop branch into my branch and fixed any merge conflicts
• [x] I have performed a self-review of my own code
• [x] I have commented my code in hard-to-understand areas
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] I have tested new or existing tests and made sure that they pass

[kingraphaii]

@Ngoakor12

As suggested in previous reviews, I'm proposing we use the check[verb][optional_qualifier] for naming our permission checking functions.

Example:

def check_user_can_request_review_on_card(logged_in_user):
    return [bool]

@user_passes_test_or_forbidden(check_user_can_request_review_on_card)
def decorated_view():
    ...

I've used it on the "request_review" action only until we all agree on a naming style for them.

Sheena also mentioned how we do not make it known that some of these expect a "card_id" to be present in the kwargs, but I haven't been able to come up with a clean solution so far; feel free to suggest a better way to handle this.