fix(linter/import-first): correctly respect all relative path imports (#17268)

Closes: #17020 

Update path pattern check for `is_relative_import` in `import/first` import rule and add supporting tests.

Co-authored-by: Cameron <[email protected]>

Author: mohitk05

crates/oxc_linter/src/rules/import/first.rs

@@ -83,7 +83,9 @@ declare_oxc_lint!(
 );
 
 fn is_relative_path(path: &str) -> bool {
-    path.starts_with("./")
+    // A path is considered relative if it starts with "/", "./", or "../"
+    // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import#module_specifier_resolution
+    path.starts_with("./") || path.starts_with("../") || path.starts_with('/')
 }
 
 /// <https://github.com/import-js/eslint-plugin-import/blob/v2.29.1/docs/rules/first.md>
@@ -169,6 +171,17 @@ fn test() {
             export { x, y }",
             None,
         ),
+        // Relative imports with absolute-first
+        (
+            r"import { y } from 'bar';
+              import { x } from '../foo';",
+            Some(json!(["absolute-first"])),
+        ),
+        (
+            r"import { y } from 'bar';
+              import { x } from '/foo';",
+            Some(json!(["absolute-first"])),
+        ),
     ];
 
     let fail = vec![
@@ -208,6 +221,17 @@ fn test() {
               import F3 = require('mod');",
             None,
         ),
+        // Relative imports with absolute-first
+        (
+            r"import { x } from '../foo';
+              import { y } from 'bar';",
+            Some(json!(["absolute-first"])),
+        ),
+        (
+            r"import { x } from '/foo';
+              import { y } from 'bar';",
+            Some(json!(["absolute-first"])),
+        ),
     ];
 
     Tester::new(First::NAME, First::PLUGIN, pass, fail)

crates/oxc_linter/src/snapshots/import_first.snap

@@ -81,3 +81,19 @@ source: crates/oxc_linter/src/tester.rs
    ·               ───────────────────────────
    ╰────
   help: Move import statement to the top of the file
+
+  ⚠ eslint-plugin-import(first): Relative imports before absolute imports are prohibited
+   ╭─[index.ts:2:33]
+ 1 │ import { x } from '../foo';
+ 2 │               import { y } from 'bar';
+   ·                                 ─────
+   ╰────
+  help: Move absolute import above relative import
+
+  ⚠ eslint-plugin-import(first): Relative imports before absolute imports are prohibited
+   ╭─[index.ts:2:33]
+ 1 │ import { x } from '/foo';
+ 2 │               import { y } from 'bar';
+   ·                                 ─────
+   ╰────
+  help: Move absolute import above relative import