Fix pre-commit: Add .pre-commit-config.yaml

- Add comprehensive pre-commit configuration file
- Include hooks for file validation (trailing whitespace, end-of-file, etc.)
- Add YAML validation for user profile files
- Add Prettier formatting for JS, CSS, HTML, Markdown, YAML, JSON
- Add Markdownlint for documentation quality
- Exclude _site/, node_modules/, and package-lock.json

Fixes #243

Author: Subham-KRLX

.pre-commit-config.yaml

@@ -0,0 +1,49 @@
+# Pre-commit configuration for NextCommunity.github.io
+# See https://pre-commit.com for more information
+
+repos:
+  # Standard pre-commit hooks for basic file checks
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: trailing-whitespace
+        exclude: ^package-lock\.json$
+      - id: end-of-file-fixer
+        exclude: ^package-lock\.json$
+      - id: check-yaml
+        args: ["--unsafe"]
+      - id: check-added-large-files
+        args: ['--maxkb=1000']
+      - id: check-json
+        exclude: ^package-lock\.json$
+      - id: check-merge-conflict
+      - id: check-case-conflict
+      - id: mixed-line-ending
+        args: ['--fix=lf']
+
+  # Prettier for code formatting (JavaScript, CSS, HTML, Markdown, YAML, JSON)
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: v3.1.0
+    hooks:
+      - id: prettier
+        types_or: [javascript, css, html, markdown, yaml, json]
+        exclude: ^(package-lock\.json|_site/)
+        additional_dependencies:
+          - prettier@3.1.0
+
+  # Markdownlint for markdown files
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.39.0
+    hooks:
+      - id: markdownlint
+        args: ['--fix']
+        exclude: ^node_modules/
+
+# Exclude patterns applied to all hooks
+exclude: |
+  (?x)(
+    ^_site/|
+    ^node_modules/|
+    ^\.git/|
+    package-lock\.json
+  )