POC: chore: use Nx workspace lint rules (#3163)

* chore: use Nx workspace lint rules

Closes #3162

* Fix lint

* Fix lint on BE

* Fix tests

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

tools/eslint-rules/rules/no-hardcoded-colors.ts

@@ -0,0 +1,61 @@
+import { ESLintUtils, TSESTree } from '@typescript-eslint/utils';
+
+// NOTE: The rule will be available in ESLint configs as "@nx/workspace-no-hardcoded-colors"
+export const RULE_NAME = 'no-hardcoded-colors';
+
+export const rule = ESLintUtils.RuleCreator(() => __filename)({
+  name: RULE_NAME,
+  meta: {
+    docs: {
+      description:
+        'Do not use hardcoded RGBA or Hex colors. Please use a color from the theme file.',
+    },
+    messages: {
+      hardcodedColor:
+        'Hardcoded color {{ color }} found. Please use a color from the theme file.',
+    },
+    type: 'suggestion',
+    schema: [],
+    fixable: 'code',
+  },
+  defaultOptions: [],
+  create: (context) => {
+    const testHardcodedColor = (
+      literal: TSESTree.Literal | TSESTree.TemplateLiteral,
+    ) => {
+      const colorRegex = /(?:rgba?\()|(?:#[0-9a-fA-F]{2,6})/i;
+
+      if (
+        literal.type === TSESTree.AST_NODE_TYPES.Literal &&
+        typeof literal.value === 'string'
+      ) {
+        if (colorRegex.test(literal.value)) {
+          context.report({
+            node: literal,
+            messageId: 'hardcodedColor',
+            data: {
+              color: literal.value,
+            },
+          });
+        }
+      } else if (literal.type === TSESTree.AST_NODE_TYPES.TemplateLiteral) {
+        const firstStringValue = literal.quasis[0]?.value.raw;
+
+        if (colorRegex.test(firstStringValue)) {
+          context.report({
+            node: literal,
+            messageId: 'hardcodedColor',
+            data: {
+              color: firstStringValue,
+            },
+          });
+        }
+      }
+    };
+
+    return {
+      Literal: testHardcodedColor,
+      TemplateLiteral: testHardcodedColor,
+    };
+  },
+});