chore: Adding workflows

.github/workflows/issue_closed.yml

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+name: Issue Closed
+
+on:
+  issues:
+    types: [closed]
+
+permissions:
+  issues: write
+
+jobs:
+  cleanup-labels:
+    runs-on: ubuntu-latest
+    if: ${{ (contains(github.event.issue.labels.*.name, 'pending-response') || contains(github.event.issue.labels.*.name, 'closing soon') || contains(github.event.issue.labels.*.name, 'pending-release')) }}
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 #v4.1.1
+      - name: remove unnecessary labels after closing
+        shell: bash
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ISSUE_NUMBER: ${{ github.event.issue.number }}
+        run: |
+          gh issue edit $ISSUE_NUMBER --remove-label "closing soon" --remove-label "pending-response" --remove-label "pending-release"
+
+  comment-visibility-warning:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: aws-actions/closed-issue-message@v1
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"
+          message: |
+            This issue is now closed. Comments on closed issues are hard for our team to see. 
+            If you need more assistance, please open a new issue that references this one.
+            If you wish to keep having a conversation with other community members under this issue feel free to do so.

.github/workflows/issue_comment.yml

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+name: Issue Comment
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  notify:
+    runs-on: ubuntu-latest
+    permissions: {}
+    if: ${{ !github.event.issue.pull_request && !contains(fromJSON('["MEMBER", "OWNER"]'), github.event.comment.author_association) }}
+    steps:
+      - name: Run webhook curl command
+        env:
+          WEBHOOK_URL: ${{ secrets.SLACK_COMMENT_WEBHOOK_URL }}
+          COMMENT: ${{toJson(github.event.comment.body)}}
+          USER: ${{github.event.comment.user.login}}
+          COMMENT_URL: ${{github.event.comment.html_url}}
+        shell: bash
+        run: echo $COMMENT | sed "s/\\\n/. /g; s/\\\r//g; s/[^a-zA-Z0-9 &().,:]//g" | xargs -I {} curl -s POST "$WEBHOOK_URL" -H "Content-Type:application/json" --data '{"comment":"{}", "commentUrl":"'$COMMENT_URL'", "user":"'$USER'"}'
+
+  remove-pending-response-label:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    if: ${{ !github.event.issue.pull_request && contains(github.event.issue.labels.*.name, 'pending-response') }}
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 #v4.1.1
+      - name: remove unnecessary labels after closing
+        shell: bash
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ISSUE_NUMBER: ${{ github.event.issue.number }}
+        run: |
+          gh issue edit $ISSUE_NUMBER --remove-label "pending-response"

.github/workflows/issue_opened.yml

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+name: Issue Opened
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  notify:
+    runs-on: ubuntu-latest
+    permissions: {}
+    if: ${{ !contains(fromJSON('["MEMBER", "OWNER"]'), github.event.issue.author_association) }}
+    steps:
+      - name: Run webhook curl command
+        env:
+          WEBHOOK_URL: ${{ secrets.SLACK_ISSUE_WEBHOOK_URL }}
+          ISSUE: ${{toJson(github.event.issue.title)}}
+          ISSUE_URL: ${{github.event.issue.html_url}}
+          USER: ${{github.event.issue.user.login}}
+        shell: bash
+        run: echo $ISSUE | sed 's/[^a-zA-Z0-9 &().,:]//g' | xargs -I {} curl -s POST "$WEBHOOK_URL" -H "Content-Type:application/json" --data '{"issue":"{}", "issueUrl":"'$ISSUE_URL'", "user":"'$USER'"}'
+
+  maintainer-opened:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    if: ${{ contains(fromJSON('["MEMBER", "OWNER"]'), github.event.issue.author_association) }}
+    steps:
+      - name: Post comment if maintainer opened.
+        shell: bash
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ISSUE_NUMBER: ${{ github.event.issue.number }}
+        run: |
+          gh issue comment $ISSUE_NUMBER --repo aws-amplify/amplify-swift -b "This issue was opened by a maintainer of this repository; updates will be posted here. If you are also experiencing this issue, please comment here with any relevant information so that we're aware and can prioritize accordingly."