feat: improve rules_js parity

internal/js_compat.bzl

@@ -0,0 +1,29 @@
+"""rules_js-style compatibility exports backed by Bun."""
+
+load("//internal:bun_binary.bzl", _bun_binary = "bun_binary")
+load("//internal:bun_test.bzl", _bun_test = "bun_test")
+load("//internal:js_library.bzl", _JsInfo = "JsInfo", _js_library = "js_library", _ts_library = "ts_library")
+load("//internal:js_run_devserver.bzl", _js_run_devserver = "js_run_devserver")
+
+JsInfo = _JsInfo
+js_library = _js_library
+ts_library = _ts_library
+js_run_devserver = _js_run_devserver
+
+def js_binary(name, **kwargs):
+    _bun_binary(name = name, **kwargs)
+
+def js_test(name, entry_point = None, srcs = None, **kwargs):
+    if entry_point != None:
+        if srcs != None:
+            fail("js_test accepts either `entry_point` or `srcs`, but not both")
+        srcs = [entry_point]
+
+    if srcs == None:
+        fail("js_test requires `entry_point` or `srcs`")
+
+    _bun_test(
+        name = name,
+        srcs = srcs,
+        **kwargs
+    )