Issue housekeeping (#2078)

* Added GitHub issue templates and config.yaml for issue templating

* Fixed capitalisation of labels.

.github/ISSUE_TEMPLATES/bugreport.yaml

@@ -0,0 +1,62 @@
+name: Bug Report
+description: File a bug report or issue
+title: "[Bug]: "
+labels: ['Bug', 'triage']
+assignees: []
+body:
+  - type: markdown
+    attributes:
+      values: > 
+        ## Please note:
+        This form should only be used if _you can reporoduce_ the bug the current
+        *current* release of netbox. For installation, configuration or other help with Open5GS please
+        use our [discussion forum](https://github.com/open5gs/open5gs/discussions).
+
+  - type: input
+    attributes:
+      label: Open5GS Release, Revision, or Tag
+      placeholder: v2.6.0
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: >
+        Please describe in detail the steps needed to reproduce this bug. These steps
+        should reproduce the issue on the most current release of Open5GS. Be sure to
+        include configuration and platform details.
+
+        Please include logs from the relevant daemons as well as any relevant packet captures.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Logs
+      description: Provide any relevant captured logs for the issue
+      render: shell
+
+  - type: textarea
+    attributes:
+      label: Expected behaviour
+      description: What did you expect to happen?
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Observed Behaviour
+      description: What's the observed behaviour?
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: eNodeB/gNodeB
+      description: If using an eNB or gNB, please identify which vendor/version
+
+  - type: input
+    attributes:
+      label: UE Models and versions
+      description: Which UE hardware model and version or simulator version are you using?

.github/ISSUE_TEMPLATES/config.yaml

@@ -0,0 +1,9 @@
+blank_issues_enabled: false
+contact_links:
+        - name: Open5GS Contribution Guide
+          url: https://github.com/open5gs/open5gs/wiki/Contribution-guide
+          about: Contribution guide detailing how you can help the project
+        - name: Project Sponsorship
+          url: https://github.com/sponsors/acetcom
+          name: Support the Open5GS developer using GitHub sponsorship
+

.github/ISSUE_TEMPLATES/feature_request.yaml

@@ -0,0 +1,48 @@
+name: Feature request
+description: Propose an enhancement to Open5GS
+labels: ['Enhancement', 'triage']
+body:
+  - type: markdown
+    attributes:
+      value: >
+        ## Feature request
+        Please submit your feature request using the form. If your proposal is not sufficiently
+        well formed, we may request further clarification and expansion. If you're unsure about
+        how to formulate your request, please start a [discussion instead](https://github.com/open5gs/open5gs/dicsussions/).
+
+  - type: input
+    attributes:
+      label: Open5GS Release, Revision, or Tag
+      placeholder: v2.6.0
+    validations:
+      required: true
+
+  - type: input
+    attributes:
+      label: Components and subsystems
+      description: Which subsystems and components would this feature be relevant to?
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: Proposed functionality
+      description: >
+        Provide a detailed description of the feature or behaviour you are proposing. Please include any
+        Please include any relevant 3GPP standards and references and include any specific changes to
+        current protocols, processing pipelines, DIAMETER requests/responses, and interfaces. The more detail
+        you provide, the greater the chance your proposal has of being discussed.
+
+        If your feature request does not include anything actionable or sufficient details, you may be asked
+        to provide further clarification or your request may be rejected.
+    validations:
+      required: true
+
+  - type: textarea
+    attributes:
+      label: External dependencies
+      description: >
+        Please detail any new dependencies or implementations that this feature might introduce. e.g. Does the 
+        proposal require the installation of additional packages? Are there further external nodes which may be
+        required for integration testing? (Not all feature requests will introduce new dependencies)
+