fix(parse/tailwind): fix lexing variants that start with numbers

Author: dyc3

crates/biome_tailwind_parser/src/lexer/mod.rs

@@ -58,7 +58,7 @@ impl<'src> TailwindLexer<'src> {
             b'-' => self.consume_byte(T![-]),
             b'!' => self.consume_byte(T![!]),
             b'/' => self.consume_byte(T![/]),
-            _ if current.is_ascii_alphabetic() => self.consume_base(),
+            _ if current.is_ascii_alphanumeric() => self.consume_base(),
             _ => {
                 if self.position == 0
                     && let Some((bom, bom_size)) = self.consume_potential_bom(UNICODE_BOM)

crates/biome_tailwind_parser/tests/tailwind_specs/ok/variants/starts-with-number.txt

@@ -0,0 +1 @@
+2xl:table

crates/biome_tailwind_parser/tests/tailwind_specs/ok/variants/starts-with-number.txt.snap

@@ -0,0 +1,54 @@
+---
+source: crates/biome_tailwind_parser/tests/spec_test.rs
+expression: snapshot
+---
+## Input
+
+```text
+2xl:table
+
+```
+
+
+## AST
+
+```
+TwRoot {
+    bom_token: missing (optional),
+    candidates: TwCandidateList [
+        TwFullCandidate {
+            variants: TwVariantList [
+                TwStaticVariant {
+                    base_token: TW_BASE@0..3 "2xl" [] [],
+                },
+                COLON@3..4 ":" [] [],
+            ],
+            negative_token: missing (optional),
+            candidate: TwStaticCandidate {
+                base_token: TW_BASE@4..10 "table" [] [Newline("\n")],
+            },
+            excl_token: missing (optional),
+        },
+    ],
+    eof_token: EOF@10..10 "" [] [],
+}
+```
+
+## CST
+
+```
+0: [email protected]
+  0: (empty)
+  1: [email protected]
+    0: [email protected]
+      0: [email protected]
+        0: [email protected]
+          0: [email protected] "2xl" [] []
+        1: [email protected] ":" [] []
+      1: (empty)
+      2: [email protected]
+        0: [email protected] "table" [] [Newline("\n")]
+      3: (empty)
+  2: [email protected] "" [] []
+
+```