chore: add pre-commit and re-format all files

Author: Aryan20

.eslintrc

@@ -0,0 +1,10 @@
+{
+    "parserOptions": {
+      "ecmaVersion": "latest",
+      "sourceType": "module"
+    },
+  
+    "env": {
+      "es6": true
+    }
+  }

.pre-commit-config.yaml

@@ -0,0 +1,80 @@
+exclude: "node_modules|.git"
+default_stages: [commit]
+fail_fast: false
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.5.0
+    hooks:
+      - id: end-of-file-fixer
+      - id: trailing-whitespace
+        files: '^next_crm/.*\.py'
+        exclude: ".*json$|.*txt$|.*csv|.*md|.*svg"
+      - id: check-yaml
+      - id: check-merge-conflict
+      - id: check-ast
+      - id: check-json
+      - id: check-toml
+      - id: check-yaml
+      - id: debug-statements
+        files: '^next_crm/.*\.py'
+
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v3.15.0
+    hooks:
+      - id: pyupgrade
+        args: ["--py310-plus"]
+
+  - repo: https://github.com/psf/black
+    rev: 24.2.0
+    hooks:
+      - id: black
+        files: '^next_crm/.*\.py'
+
+  - repo: https://github.com/pre-commit/mirrors-prettier
+    rev: v3.1.0
+    hooks:
+      - id: prettier
+        files: '^next_crm/.*\.js|jsx|ts|tsx'
+        # Ignore any files that might contain jinja / bundles
+        exclude: |
+          (?x)^(
+              next_crm/public/dist/.*|
+              .*node_modules.*|
+              .*boilerplate.*|
+              next_crm/www/website_script.js|
+              next_crm/templates/includes/.*|
+              next_crm/public/js/lib/.*|
+              next_crm/website/doctype/website_theme/website_theme_template.scss
+          )$
+
+  - repo: https://github.com/pre-commit/mirrors-eslint
+    rev: v8.56.0
+    hooks:
+      - id: eslint
+        files: '^next_crm/.*\.js|jsx|ts|tsx'
+        args: ["--quiet"]
+        # Ignore any files that might contain jinja / bundles
+        exclude: |
+          (?x)^(
+              next_crm/public/dist/.*|
+              cypress/.*|
+              .*node_modules.*|
+              .*boilerplate.*|
+              next_crm/www/website_script.js|
+              next_crm/templates/includes/.*|
+              next_crm/public/js/lib/.*
+          )$
+
+  - repo: https://github.com/PyCQA/isort
+    rev: 5.13.2
+    hooks:
+      - id: isort
+        args: ["--profile", "black"]
+        files: '^next_crm/.*\.py'
+
+  - repo: https://github.com/PyCQA/flake8
+    rev: 7.0.0
+    hooks:
+      - id: flake8
+        additional_dependencies: ["flake8-isort", "flake8-bugbear"]