chore: move cli/tests/ -> tests/ (#22369)

This looks like a massive PR, but it's only a move from cli/tests ->
tests, and updates of relative paths for files.

This is the first step towards aggregate all of the integration test
files under tests/, which will lead to a set of integration tests that
can run without the CLI binary being built.

While we could leave these tests under `cli`, it would require us to
keep a more complex directory structure for the various test runners. In
addition, we have a lot of complexity to ignore various test files in
the `cli` project itself (cargo publish exclusion rules, autotests =
false, etc).

And finally, the `tests/` folder will eventually house the `test_ffi`,
`test_napi` and other testing code, reducing the size of the root repo
directory.

For easier review, the extremely large and noisy "move" is in the first
commit (with no changes -- just a move), while the remainder of the
changes to actual files is in the second commit.

1 files changed, 37 insertions, 0 deletions

diff --git a/tests/testdata/fmt/badly_formatted_fixed.md b/tests/testdata/fmt/badly_formatted_fixed.md
new file mode 100644
index 000000000..8ba74cac3
--- /dev/null
+++ b/tests/testdata/fmt/badly_formatted_fixed.md
@@ -0,0 +1,37 @@
+# Hello Markdown
+
+```js
+console.log("Hello World");
+```
+
+```javascript
+console.log("Hello World2");
+```
+
+```ts
+function hello(name: string) {
+  console.log(name);
+}
+
+hello("alice");
+```
+
+```typescript
+function foo(): number {
+  return 2;
+}
+```
+
+```jsonc
+{
+  // Comment in JSON
+  "key": "value",
+  "key2": "value2"
+}
+```
+
+```json
+{
+  "numbers": ["1", "2"]
+}
+```