[hp-ignore-file] Implement hands on hp-ignore-file (#83)

# Exercise Review

## Exercise Discussion

#58 

## Checklist

- [ ] If you require a new remote repository on the `Git-Mastery`
organization, have you [created a
request](https://github.com/git-mastery/exercises/issues/new?template=request_exercise_repository.md)
for it?
- [ ] Have you written unit tests using
[`repo-smith`](https://github.com/git-mastery/repo-smith) to validate
the exercise grading scheme?
- [x] Have you tested the download script using `test-download.sh`?
- [x] Have you verified that this exercise does not already exist or is
not currently in review?
- [ ] Did you introduce a new grading mechanism that should belong to
[`git-autograder`](https://github.com/git-mastery/git-autograder)?
- [ ] Did you introduce a new dependency that should belong to
[`app`](https://github.com/git-mastery/app)?

---------

Co-authored-by: Jiahao <woojiahao1234@gmail.com>

Author: MousseDm

hands_on/ignore_file.py

@@ -0,0 +1,16 @@
+import os
+from exercise_utils.file import create_or_update_file
+from exercise_utils.git import init
+
+__requires_git__ = True
+__requires_github__ = False
+
+def download(verbose: bool):
+    os.makedirs("stuff", exist_ok=True)
+    os.chdir("stuff")
+    init(verbose)
+
+    create_or_update_file("keep.txt", "good stuff")
+    create_or_update_file("temp.txt", "temp stuff")
+    create_or_update_file("file1.tmp", "more temp stuff")
+    create_or_update_file("file2.tmp", "even more temp stuff")