feat: Add issue template and workflow for creating themes

This commit adds an issue template and a workflow for creating themes in the repository. The issue template allows users to submit a theme to be added to the theme library, while the workflow automatically parses the submitted issue and performs necessary checks.

.github/ISSUE_TEMPLATE/create-theme.yml

@@ -0,0 +1,50 @@
+name: Sumbit a theme
+description: Submit a theme to be added to the theme library.
+title: "[create-theme]: "
+labels: ["new-theme"]
+body:
+  - type: input
+    id: name
+    attributes:
+      label: Name
+      description: The name of the theme.
+      placeholder: Theme Name
+    validations:
+      required: true
+  - type: input
+    id: description
+    attributes:
+      label: Description
+      description: A brief description of the theme.
+      placeholder: Theme Description
+    validations:
+      required: true
+  - type: input
+    id: homepage
+    attributes:
+      label: Homepage
+      description: The URL of the theme's homepage or repository.
+      placeholder: Theme Homepage
+    validations:
+      required: true
+  - type: textarea
+    id: Theme Styles
+    attributes:
+      label: Theme Styles
+      description: The CSS styles for the theme.
+      placeholder: |
+        body {
+          background-color: white;
+          color: black;
+        }
+    validations:
+      required: true
+  - type: markdown
+    id: readme
+    attributes:
+      label: README
+      description: A markdown display for the theme. This will be displayed in the theme marketplace.
+      placeholder: |
+        # Theme Name
+        A brief description of the theme.
+  

.github/workflows/create-theme.yml

@@ -0,0 +1,31 @@
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  titlePrefixCheck:
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Parse issue
+        id: parse
+        uses: onmax/issue-form-parser@v1.5
+        with:
+          issue_number: ${{ github.event.issue.number }}
+    
+      # Examples on how to use the output
+      - name: Show parsed payload data
+        run: |
+          # Using the character `'` to prevent all characters enclosed within
+          # them from being treated as special characters (e.g. $ or `)
+          echo '${{ steps.parse.outputs.payload }}'
+    
+          # Print the value of the "Name" field
+          echo '${{ fromJson(steps.parse.outputs.payload)["Name"] }}'
+
+      - if: startsWith(github.event.issue.title, '[create-theme]: ') != 'true'
+        name: Close Issue
+        uses: peter-evans/close-issue@v3
+        with:
+          comment: |
+            # Thank you for your contribution!