chore: import upstream snapshot with attribution

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: 🐛 Bug report
+description: Report a reproducible bug or regression in this library.
+labels: [bug]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        # Bug report
+
+        👋 Hi!
+
+        **Please fill the following carefully before opening a new issue ❗**
+        *(Your issue may be closed if it doesn't provide the required pieces of information)*
+  - type: checkboxes
+    attributes:
+      label: Before submitting a new issue
+      description: Please perform simple checks first.
+      options:
+        - label: I tested using the latest version of the library, as the bug might be already fixed.
+          required: true
+        - label: I tested using a [supported version](https://github.com/reactwg/react-native-releases/blob/main/docs/support.md) of react native.
+          required: true
+        - label: I checked for possible duplicate issues, with possible answers.
+          required: true
+  - type: textarea
+    id: summary
+    attributes:
+      label: Bug summary
+      description: |
+        Provide a clear and concise description of what the bug is.
+        If needed, you can also provide other samples: error messages / stack traces, screenshots, gifs, etc.
+    validations:
+      required: true
+  - type: input
+    id: library-version
+    attributes:
+      label: Library version
+      description: What version of the library are you using?
+      placeholder: "x.x.x"
+    validations:
+      required: true
+  - type: textarea
+    id: react-native-info
+    attributes:
+      label: Environment info
+      description: Run `react-native info` in your terminal and paste the results here.
+      render: shell
+    validations:
+      required: true
+  - type: textarea
+    id: steps-to-reproduce
+    attributes:
+      label: Steps to reproduce
+      description: |
+        You must provide a clear list of steps and code to reproduce the problem.
+      value: |
+        1. …
+        2. …
+    validations:
+      required: true
+  - type: input
+    id: reproducible-example
+    attributes:
+      label: Reproducible example repository 
+      description: Please provide a link to a repository on GitHub with a reproducible example.
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Feature Request 💡
+    url: https://github.com/margelo/react-native-graph/discussions/new?category=ideas
+    about: If you have a feature request, please create a new discussion on GitHub.
+  - name: Discussions on GitHub 💬
+    url: https://github.com/margelo/react-native-graph/discussions
+    about: If this library works as promised but you need help, please ask questions there.

.github/actions/setup/action.yml

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+name: Setup
+description: Setup Node.js and install dependencies
+
+runs:
+  using: composite
+  steps:
+    - name: Setup Node.js
+      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+      with:
+        node-version-file: .nvmrc
+
+    - name: Restore dependencies
+      id: yarn-cache
+      uses: actions/cache/restore@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
+      with:
+        path: |
+          **/node_modules
+          .yarn/install-state.gz
+        key: ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}-${{ hashFiles('**/package.json', '!node_modules/**') }}
+        restore-keys: |
+          ${{ runner.os }}-yarn-${{ hashFiles('yarn.lock') }}
+          ${{ runner.os }}-yarn-
+
+    - name: Install dependencies
+      if: steps.yarn-cache.outputs.cache-hit != 'true'
+      run: yarn install --immutable
+      shell: bash
+
+    - name: Cache dependencies
+      if: steps.yarn-cache.outputs.cache-hit != 'true'
+      uses: actions/cache/save@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
+      with:
+        path: |
+          **/node_modules
+          .yarn/install-state.gz
+        key: ${{ steps.yarn-cache.outputs.cache-primary-key }}

.github/workflows/ci.yml

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+name: CI
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  merge_group:
+    types:
+      - checks_requested
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Setup
+        uses: ./.github/actions/setup
+
+      - name: Lint files
+        run: yarn lint
+
+      - name: Typecheck files
+        run: yarn typecheck
+
+  build-library:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Setup
+        uses: ./.github/actions/setup
+
+      - name: Build package
+        run: yarn prepare
+
+  build-web:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Setup
+        uses: ./.github/actions/setup
+
+      - name: Build example for Web
+        run: |
+          yarn example expo export --platform web