feat(doc): support multiple file entry (#21018)

This commit adds support for multiple entry points to `deno doc`.

Unfortunately to achieve that, I had to change the semantics of the
command to explicitly require `--filter` parameter for filtering
symbols, instead of treating second free argument as the filter argument.

`deno doc --builtin` is still supported, but cannot be mixed with
actual entrypoints.

1 files changed, 3 insertions, 0 deletions

diff --git a/cli/tests/testdata/doc/deno_doc2.ts b/cli/tests/testdata/doc/deno_doc2.ts
new file mode 100644
index 000000000..ee6fc22dc
--- /dev/null
+++ b/cli/tests/testdata/doc/deno_doc2.ts
@@ -0,0 +1,3 @@
+/** Some JSDoc */
+export function bar() {
+}