Add Calendar layout to Global Issues page

[vinhloc30796]

Why

closes #4131 (part of)

What

• Split out renderQuickActions for BaseCalendarRoot
• Update headers/global-issues.tsx to add LayoutSelection
• Add calendar-view.tsx
• Add CalendarView to issue-layouts/roots/all-issue-layout-root.tsx
• Add types to web/constants/issue.ts
• Add issue grouping to issue.store.ts
• Minor updates to filter.store.ts

Questions / TODOs

• This PR doesn't allow changing Calendar layout (month vs week, show vs hide weekends) yet, but I'm not sure what I'm missing
• I'm not sure if I'm updating displayFilters = this.computedDisplayFilters(_filters?.display_filters); correctly in filter.store.ts
• I'm not sure if issue-layouts/calendar/calendar-view.tsx is the idiomatic/proper way & proper place to do it

[CLAassistant]

All committers have signed the CLA.