Expand available path categories (#733)

## Description

Add events and contacts. Still cannot create paths of these types
though.

## Type of change

Please check the type of change your PR introduces:
- [x] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [x] 🐹 Trivial/Minor

## Issue(s)
<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->

#671 

## Test Plan

<!-- How will this be tested prior to merging.-->

- [ ] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E

src/internal/path/categorytype_string.go

@@ -10,11 +10,13 @@ func _() {
 	var x [1]struct{}
 	_ = x[UnknownCategory-0]
 	_ = x[EmailCategory-1]
+	_ = x[ContactsCategory-2]
+	_ = x[EventsCategory-3]
 }
 
-const _CategoryType_name = "UnknownCategoryemail"
+const _CategoryType_name = "UnknownCategoryemailcontactsevents"
 
-var _CategoryType_index = [...]uint8{0, 15, 20}
+var _CategoryType_index = [...]uint8{0, 15, 20, 28, 34}
 
 func (i CategoryType) String() string {
 	if i < 0 || i >= CategoryType(len(_CategoryType_index)-1) {

src/internal/path/resource_path.go

@@ -27,14 +27,20 @@ type CategoryType int
 
 //go:generate stringer -type=CategoryType -linecomment
 const (
-	UnknownCategory CategoryType = iota
-	EmailCategory                // email
+	UnknownCategory  CategoryType = iota
+	EmailCategory                 // email
+	ContactsCategory              // contacts
+	EventsCategory                // events
 )
 
 func toCategoryType(category string) CategoryType {
 	switch category {
 	case EmailCategory.String():
 		return EmailCategory
+	case ContactsCategory.String():
+		return ContactsCategory
+	case EventsCategory.String():
+		return EventsCategory
 	default:
 		return UnknownCategory
 	}
@@ -43,7 +49,9 @@ func toCategoryType(category string) CategoryType {
 // serviceCategories is a mapping of all valid service/category pairs.
 var serviceCategories = map[ServiceType]map[CategoryType]struct{}{
 	ExchangeService: {
-		EmailCategory: {},
+		EmailCategory:    {},
+		ContactsCategory: {},
+		EventsCategory:   {},
 	},
 }
 

src/internal/path/service_category_test.go

@@ -81,6 +81,22 @@ func (suite *ServiceCategoryUnitSuite) TestValidateServiceAndCategory() {
 			expectedCategory: EmailCategory,
 			check:            assert.NoError,
 		},
+		{
+			name:             "ExchangeContacts",
+			service:          ExchangeService.String(),
+			category:         ContactsCategory.String(),
+			expectedService:  ExchangeService,
+			expectedCategory: ContactsCategory,
+			check:            assert.NoError,
+		},
+		{
+			name:             "ExchangeEvents",
+			service:          ExchangeService.String(),
+			category:         EventsCategory.String(),
+			expectedService:  ExchangeService,
+			expectedCategory: EventsCategory,
+			check:            assert.NoError,
+		},
 	}
 	for _, test := range table {
 		suite.T().Run(test.name, func(t *testing.T) {