github/issue_template: set the type of the issue

.github/ISSUE_TEMPLATE/2_bug_report_linux.yml

@@ -1,6 +1,7 @@
 name: "Report a Linux Issue"
 description: "Create a report for a runtime related Linux Issue"
 labels: ["os:linux"]
+type: Bug
 body:
 - type: textarea
   attributes:

.github/ISSUE_TEMPLATE/2_bug_report_macos.yml

@@ -1,6 +1,7 @@
 name: "Report a macOS Issue"
 description: "Create a report for a runtime related macOS Issue"
 labels: ["os:mac"]
+type: Bug
 body:
 - type: textarea
   attributes:

.github/ISSUE_TEMPLATE/2_bug_report_windows.yml

@@ -1,6 +1,7 @@
 name: "Report a Windows Issue"
 description: "Create a report for a runtime related Windows Issue"
 labels: ["os:win"]
+type: Bug
 body:
 - type: textarea
   attributes:

.github/ISSUE_TEMPLATE/3_bug_report.yml

@@ -1,6 +1,7 @@
 name: "Report an Issue on other platforms"
 description: "Create a report for a runtime related Issue on other platforms"
 labels: []
+type: Bug
 body:
 - type: textarea
   attributes:

.github/ISSUE_TEMPLATE/4_bug_report_build.yml

@@ -1,6 +1,7 @@
 name: "Report a build Problem"
 description: "Create a report for a build related Issue"
 labels: ["core:meson"]
+type: Bug
 body:
 - type: textarea
   attributes:

.github/ISSUE_TEMPLATE/5_feature_request.yml

@@ -1,6 +1,7 @@
 name: "Request a new Feature"
 description: "Create a request for a new feature"
 labels: ["meta:feature-request"]
+type: Feature
 body:
 - type: textarea
   attributes: