feat(fmt): add support for configuration file (#11944)

This commit adds support for configuration file for "deno fmt"
subcommand. It is also respected by LSP when formatting
files.

Example configuration:
{
    "fmt": {
        "files": {
            "include": ["src/"],
            "exclude": ["src/testdata/"]
        },
        "options": {
            "useTabs": true,
            "lineWidth": 80,
            "indentWidth": 4,
            "singleQuote": true,
            "textWrap": "preserve"
        }
    }
}

1 files changed, 15 insertions, 0 deletions

diff --git a/cli/tests/testdata/fmt/fmt_with_config/b.ts b/cli/tests/testdata/fmt/fmt_with_config/b.ts
new file mode 100644
index 000000000..5c37d51d2
--- /dev/null
+++ b/cli/tests/testdata/fmt/fmt_with_config/b.ts
@@ -0,0 +1,15 @@
+// This file should be excluded from formatting
+unitTest(
+    { perms: { net: true } },
+    async function fetchBodyUsedCancelStream() {
+      const response = await fetch(
+        "http://localhost:4545/fixture.json",
+      );
+      assert(response.body !== null);
+  
+      assertEquals(response.bodyUsed, false);
+      const promise = response.body.cancel();
+      assertEquals(response.bodyUsed, true);
+      await promise;
+    },
+);
\ No newline at end of file