Forms for Tailwind

[pxwxnvermx]

This PR adds

• Add budget Form
• Add/Edit Payment Invoice
• Added Opportunity Create forms -> Init, AddPaymentUnits and Finalize
• Program Create and Edit forms
• Invite network manager form
• Visit Export form

[sravfeyn]

@pxwxnvermx

This is going to be quite important as we are touching a lot of views, in case any of these views get updated on the main branch, we are going to hard time integrating these back in. Let's refactor the method based views also like this to be DRY.

from django.views.decorators.debug import sensitive_post_parameters
from django.shortcuts import render, redirect
from django.conf import settings
from django.test.utils import override_settings

@override_settings(CRISPY_TEMPLATE_PACK="tailwind")
def _add_budget_existing_users_view(request, org_slug, pk, form_class):
    opportunity = get_opportunity_or_404(org_slug=org_slug, pk=pk)
    opportunity_access = OpportunityAccess.objects.filter(opportunity=opportunity)
    opportunity_claims = OpportunityClaim.objects.filter(opportunity_access__in=opportunity_access)

    form = form_class(
        opportunity_claims=opportunity_claims,
        opportunity=opportunity,
        data=request.POST or None,
    )

    if form.is_valid():
        form.save()
        return redirect("opportunity:detail", org_slug, pk)

    return render(
        request,
        "tailwind/pages/add_visits_existing_users.html",
        {
            "form": form,
            "opportunity_claims": opportunity_claims,
            "budget_per_visit": opportunity.budget_per_visit_new,
            "opportunity": opportunity,
        },
    )

And then use it like below in both the places.

@org_member_required
def add_budget_existing_users(request, org_slug=None, pk=None):
    return _add_budget_existing_users_view(request, org_slug, pk, TWAddBudgetExistingUsersForm)