feat:pull the slack message service out to slack pkg

Signed-off-by: manish-singh-bisht <mthefool218@gmail.com>

pkg/slack/connector_config.go

@@ -0,0 +1,31 @@
+package slack
+
+import (
+	"encoding/json"
+	"strings"
+	"text/template"
+)
+
+var (
+	accessRequestTemplate = template.Must(
+		template.New("access-request.json.tmpl").
+			Funcs(template.FuncMap{
+				"jsonEscape": func(s string) string {
+					b, _ := json.Marshal(s)
+					return string(b[1 : len(b)-1])
+				},
+				"buildAcceptAllValue": func(docIDs, repIDs []string) string {
+					value := map[string][]string{
+						"document_ids": docIDs,
+						"report_ids":   repIDs,
+					}
+					b, _ := json.Marshal(value)
+					s := string(b)
+					s = strings.ReplaceAll(s, `\`, `\\`)
+					s = strings.ReplaceAll(s, `"`, `\"`)
+					return s
+				},
+			}).
+			ParseFS(Templates, "templates/access-request.json.tmpl"),
+	)
+)