fix(tsc): more informative diagnostic when `Deno` does not exist (#19825)

Also improved the diagnostic when using something like `Deno.openKv` and
it doesn't exist.

2 files changed, 8 insertions, 0 deletions

diff --git a/cli/tests/testdata/check/deno_not_found/main.out b/cli/tests/testdata/check/deno_not_found/main.out
new file mode 100644
index 000000000..39852ab95
--- /dev/null
+++ b/cli/tests/testdata/check/deno_not_found/main.out
@@ -0,0 +1,4 @@
+error: TS2304 [ERROR]: Cannot find name 'Deno'. Do you need to change your target library? Try changing the 'lib' compiler option to include 'deno.ns' or add a triple-slash directive to your entrypoint: /// <reference lib="deno.ns" />
+Deno;
+~~~~
+    at file:///[WILDCARD]/check/deno_not_found/main.ts:4:1
diff --git a/cli/tests/testdata/check/deno_not_found/main.ts b/cli/tests/testdata/check/deno_not_found/main.ts
new file mode 100644
index 000000000..3269f047a
--- /dev/null
+++ b/cli/tests/testdata/check/deno_not_found/main.ts
@@ -0,0 +1,4 @@
+/// <reference no-default-lib="true"/>
+/// <reference lib="es5" />
+
+Deno;