feat(suite): Implement Suites (#1239)

* feat(suite): Implement Suites

Fixes #1230

* Update docs

* Fix variable alignment

* Prevent always-run endpoint from running if a context placeholder fails to resolve in the URL

* Return errors when a context placeholder path fails to resolve

* Add a couple of unit tests

* Add a couple of unit tests

* fix(ui): Update group count properly

Fixes #1233

* refactor: Pass down entire config instead of several sub-configs

* fix: Change default suite interval and timeout

* fix: Deprecate disable-monitoring-lock in favor of concurrency

* fix: Make sure there are no duplicate keys

* Refactor some code

* Update watchdog/watchdog.go

* Update web/app/src/components/StepDetailsModal.vue

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* chore: Remove useless log

* fix: Set default concurrency to 3 instead of 5

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

config/suite/result.go

@@ -0,0 +1,55 @@
+package suite
+
+import (
+	"time"
+
+	"github.com/TwiN/gatus/v5/config/endpoint"
+)
+
+// Result represents the result of a suite execution
+type Result struct {
+	// Name of the suite
+	Name string `json:"name,omitempty"`
+
+	// Group of the suite
+	Group string `json:"group,omitempty"`
+
+	// Success indicates whether all required endpoints succeeded
+	Success bool `json:"success"`
+
+	// Timestamp is when the suite execution started
+	Timestamp time.Time `json:"timestamp"`
+
+	// Duration is how long the entire suite execution took
+	Duration time.Duration `json:"duration"`
+
+	// EndpointResults contains the results of each endpoint execution
+	EndpointResults []*endpoint.Result `json:"endpointResults"`
+
+	// Context is the final state of the context after all endpoints executed
+	Context map[string]interface{} `json:"-"`
+
+	// Errors contains any suite-level errors
+	Errors []string `json:"errors,omitempty"`
+}
+
+// AddError adds an error to the suite result
+func (r *Result) AddError(err string) {
+	r.Errors = append(r.Errors, err)
+}
+
+// CalculateSuccess determines if the suite execution was successful
+func (r *Result) CalculateSuccess() {
+	r.Success = true
+	// Check if any endpoints failed (all endpoints are required)
+	for _, epResult := range r.EndpointResults {
+		if !epResult.Success {
+			r.Success = false
+			break
+		}
+	}
+	// Also check for suite-level errors
+	if len(r.Errors) > 0 {
+		r.Success = false
+	}
+}