Add Git LFS instructions

.gitattributes

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+assets/datasets/* filter=lfs diff=lfs merge=lfs -text

.github/workflows/pr_file_check.yaml

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+name: Check for Large Files and Restricted Extensions
+
+on:
+  pull_request:
+    branches: 
+      - main
+    types: [opened, synchronize, reopened]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  LLVM_VERSION: 16
+
+jobs:
+  check-files:
+    name: Check file size and type
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          set-safe-directory: true
+          fetch-depth: 1
+
+      - name: Fetch base branch
+        run: git fetch origin ${{ github.event.pull_request.base.ref }} --depth=1
+
+      - name: Check for large files
+        run: |
+          MAX_SIZE=5M  # Set max file size limit
+          LARGE_FILES=$(git diff --name-only --diff-filter=A origin/${{ github.event.pull_request.base.ref }} | xargs du -h | awk -v max="$MAX_SIZE" '$1 > max {print $2}')
+
+          if [[ ! -z "$LARGE_FILES" ]]; then
+            echo "❌ The following files exceed the allowed size of $MAX_SIZE:"
+            echo "$LARGE_FILES"
+            exit 1
+          fi
+
+      - name: Check for restricted file types
+        run: |
+          BLOCKED_EXTENSIONS="(exe|zip|tar.gz|bz2)"  # Add any forbidden extensions
+          BAD_FILES=$(git diff --name-only --diff-filter=A origin/${{ github.event.pull_request.base.ref }} | grep -E "\.($BLOCKED_EXTENSIONS)$" || true)
+          if [[ ! -z "$BAD_FILES" ]]; then
+            echo "❌ The following files have restricted extensions:"
+            echo "$BAD_FILES"
+            exit 1
+          fi

assets/README.md

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+# Git LFS Setup and Usage Guide
+
+## Installation
+
+Git LFS must be installed before using it in a repository. Follow the installation steps based on your operating system.
+
+### Ubuntu (Debian-based distributions)
+```sh
+sudo apt update
+sudo apt install git-lfs
+git lfs install
+
+### AlmaLinux and ManyLinux
+sudo dnf install git-lfs
+git lfs install
+
+### macOS
+brew install git-lfs
+git lfs install
+```
+
+## Tracking and committing large files
+
+1. Initialize Git LFS in your repository: 
+
+    `git lfs install` 
+
+2. Track specific file types or individual files using the following command: 
+
+    `git lfs track "assets/*"`, where `assets` is a directory containing large files.
+
+3. Commit the changes to `.gitattributes`: 
+
+    `git add .gitattributes && git commit -m "Track large files with Git LFS"`
+
+4. Add and commit the large files: 
+
+    `git add assets/largefile.zip && git commit -m "Add large file"`
+
+5. Push to remote:
+
+    `git push origin branch_name`
+
+## Cloning and fetching large files
+
+1. Clone a repository that uses Git LFS:
+
+    `git clone https://github.com/username/repository.git`. By default, cloning only retrieves the pointer files to the large file. To fetch the actual large files, use `git lfs pull`.
+
+2. Fetch large files for an existing repository:
+
+    `git lfs pull`
+
+## Check Git LFS status
+
+To check which files are tracked by Git LFS:
+
+    `git lfs ls-files` 
+
+## Removing a file from LFS
+
+Use the following steps to remove a file from LFS:
+
+    `git rm --cached assets/largefile.zip`, then commit and push.
+
+    Once the file is removed, remember to delete the tracking information in `.gitattributes`.
+