Ignore .db files by default (#17711)

This PR ignores `.db` files by default. We already ignored `.sqlite` and
`.sqlite3` files but we didn't ignore `.db` files which is a common
extension for database files as well.

Due to the binary nature of `.db` files, scanning these could result in
hard to debug errors such as:


![image](https://github.com/user-attachments/assets/52f779ac-cd5f-4f37-9615-2163bf852999)

Author: RobinMalfait

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Don't scan `.geojson` files for classes by default ([#17700](https://github.com/tailwindlabs/tailwindcss/pull/17700))
+- Don't scan `.db` files for classes by default ([#17711](https://github.com/tailwindlabs/tailwindcss/pull/17711))
 - Hide default shadow suggestions when missing theme keys ([#17743](https://github.com/tailwindlabs/tailwindcss/pull/17743))
 - Replace `_` with `.` in theme suggestions for `@utility` if surrounded by digits ([#17743](https://github.com/tailwindlabs/tailwindcss/pull/17743))
 

crates/oxide/src/scanner/fixtures/binary-extensions.txt

@@ -37,6 +37,7 @@ cpio
 cr2
 cur
 dat
+db
 dcm
 deb
 dex
@@ -200,8 +201,6 @@ snap
 snk
 so
 sqlite
-sqlite
-sqlite3
 sqlite3
 stl
 storedata