feat(use_filenaming_convention): add support for $ prefix

This adds support for TanStack routes which use a dollar sign (`$`) prefix

Author: brandonmcconnell

crates/biome_js_analyze/src/lint/style/use_filenaming_convention.rs

@@ -24,8 +24,8 @@ declare_lint_rule! {
     ///
     /// The rule supports the following exceptions:
     ///
-    /// - The name of the file can start with a dot or a plus sign, be prefixed and suffixed by underscores `_`.
-    ///   For example, `.filename.js`, `+filename.js`, `__filename__.js`, or even `.__filename__.js`.
+    /// - The name of the file can start with a dot, a plus sign, or a dollar sign, be prefixed and suffixed by underscores `_`.
+    ///   For example, `.filename.js`, `+filename.js`, `$filename.js`, `__filename__.js`, or even `.__filename__.js`.
     ///
     ///   The convention of prefixing a filename with a plus sign is used by [Sveltekit](https://kit.svelte.dev/docs/routing#page) and [Vike](https://vike.dev/route).
     ///
@@ -217,7 +217,9 @@ impl Rule for UseFilenamingConvention {
             //
             // Support [Sveltekit](https://kit.svelte.dev/docs/routing#page) and
             // [Vike](https://vike.dev/route) routing conventions where page name starts with `+`.
-            let file_name = if matches!(first_char, b'.' | b'+') {
+            //
+            // Support filenames starting with `$`.
+            let file_name = if matches!(first_char, b'.' | b'+' | b'$') {
                 &file_name[1..]
             } else {
                 file_name
@@ -306,6 +308,8 @@ impl Rule for UseFilenamingConvention {
                     split.next()?
                 } else if let Some(stripped_name) = name.strip_prefix('+') {
                     stripped_name
+                } else if let Some(stripped_name) = name.strip_prefix('$') {
+                    stripped_name
                 } else {
                     name
                 };

crates/biome_js_analyze/tests/specs/style/useFilenamingConvention/$INVALID.js

@@ -0,0 +1,2 @@
+/* should generate diagnostics */
+

crates/biome_js_analyze/tests/specs/style/useFilenamingConvention/$INVALID.js.snap

@@ -0,0 +1,22 @@
+---
+source: crates/biome_js_analyze/tests/spec_tests.rs
+expression: $INVALID.js
+---
+# Input
+```js
+/* should generate diagnostics */
+
+
+```
+
+# Diagnostics
+```
+$INVALID.js lint/style/useFilenamingConvention ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+  i The filename should be in camelCase or kebab-case or snake_case or equal to the name of an export.
+  
+  i The filename could be renamed to one of the following names:
+    $invalid.js
+  
+
+```

crates/biome_js_analyze/tests/specs/style/useFilenamingConvention/$dollarValid.js

@@ -0,0 +1,2 @@
+/* should not generate diagnostics */
+

crates/biome_js_analyze/tests/specs/style/useFilenamingConvention/$dollarValid.js.snap

@@ -0,0 +1,10 @@
+---
+source: crates/biome_js_analyze/tests/spec_tests.rs
+expression: $dollarValid.js
+---
+# Input
+```js
+/* should not generate diagnostics */
+
+
+```

crates/biome_js_analyze/tests/specs/style/useFilenamingConvention/$dollar_snake.js

@@ -0,0 +1,2 @@
+/* should not generate diagnostics */
+

crates/biome_js_analyze/tests/specs/style/useFilenamingConvention/$dollar_snake.js.snap

@@ -0,0 +1,10 @@
+---
+source: crates/biome_js_analyze/tests/spec_tests.rs
+expression: $dollar_snake.js
+---
+# Input
+```js
+/* should not generate diagnostics */
+
+
+```