feat: improve new PR and issue labeling for triaging (aws#2400)

* feat: improve new PR and issue labeling for triaging

* missed pr labeler

* anything else -> other

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,8 +1,8 @@
 ---
 name: Bug report
 about: Create an issue to report a bug for the SAM Translator
-title: ''
-labels: ''
+title: "Bug: TITLE"
+labels: ['type/bug', 'stage/needs-triage']
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1 @@
+blank_issues_enabled: false

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,8 +1,8 @@
 ---
 name: Feature request
 about: Suggest an idea/feature/enhancement for the SAM Translator
-title: ''
-labels: ''
+title: "Feature request: TITLE"
+labels: ['type/feature', 'stage/needs-triage']
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/other.md

@@ -0,0 +1,8 @@
+---
+name: Other
+about: Choose if your issue doesn't apply to the other templates
+title: ''
+labels: ['stage/needs-triage']
+assignees: ''
+
+---

.github/workflows/pr-labeler.yml

@@ -26,6 +26,6 @@ jobs:
                 issue_number: context.issue.number,
                 owner: context.repo.owner,
                 repo: context.repo.repo,
-                labels: ['pr/external']
+                labels: ['pr/external', 'stage/needs-triage']
               })
             }