Add OWASP Dhaka metadata

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+      time: '00:45'

.github/workflows/validate-owasp-metadata.yaml

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+name: Validate OWASP entity metadata
+
+on:
+  pull_request:
+    paths:
+      - '*.owasp.yaml'
+  push:
+    paths:
+      - '*.owasp.yaml'
+
+permissions:
+  contents: read
+
+concurrency:
+  cancel-in-progress: true
+  group: ${{ github.repository }}-${{ github.workflow }}-${{ github.ref }}
+
+jobs:
+  validate-metadata:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Validate metadata file
+        uses: owasp/nest-schema/.github/actions/validate@7558419df3feab1810a7e40b55be355dcf584845

chapter.owasp.yaml

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+leaders:
+  - name: Md Jahangir Alam
+    email: [email protected]
+    github: jahangiralamdhaka
+  - name: Fahima Khanam
+    email: [email protected]
+  - name: S M Mizanur Rahman
+    email: [email protected]
+location:
+  country: Bangladesh
+  country_code: BD
+  region: Dhaka Division
+  city: Dhaka
+  latitude: 23.7644025
+  longitude: 90.389015
+meetup_group: OWASP-Dhaka-Chapter
+name: OWASP Dhaka
+repositories:
+  - name: www-chapter-dhaka
+    url: https://github.com/OWASP/www-chapter-dhaka
+    description: OWASP Foundation Web Repository
+tags:
+  - dhk
+  - custom-tag-1
+  - custom-tag-2
+website: https://owasp.org/www-chapter-dhaka