feat(commit): support deleting files

[suzuki-shunsuke]

Close #317

This is still work in progress.

Example 1. Create a new branch

suzuki-shunsuke/test-github-action@572e942

$ ghcp commit -r suzuki-shunsuke/test-github-action -m "try to delete file with ghcp" -b delete-file-ghcp-6 -d main.go,go.mod,go.sum
00:41:20.484313 INFO  Author and committer: suzuki-shunsuke
00:41:20.484864 INFO  Creating a branch (delete-file-ghcp-6) based on the default branch
00:41:20.749227 INFO  Created tree aefd1430f509374e66acb8a4abf8f38de2776a9c
00:41:21.202100 INFO  Created commit 572e942926124582d673373d0d13f96bd34cdfb5
00:41:21.609115 INFO  Created a commit with 3 changed file(s)
00:41:22.121244 INFO  Created a branch (delete-file-ghcp-6)

Example 2. Move a file

suzuki-shunsuke/test-github-action@0bd747e

$ ghcp commit -r suzuki-shunsuke/test-github-action -m "try to delete file with ghcp" -b delete-file-ghcp-7 main2.go -d main.go,README.md
00:44:39.244207 INFO  Author and committer: suzuki-shunsuke
00:44:39.244551 INFO  Creating a branch (delete-file-ghcp-7) based on the default branch
00:44:39.533050 INFO  Uploaded main2.go as blob 99737699383d26b6895f471a6d5991ebdfcd79fc
00:44:39.858885 INFO  Created tree 3cb356a3a887b0943ef15d8388537e7ac7828b16
00:44:40.270721 INFO  Created commit 0bd747ebbb0673d1c2aceaeb402f3d18336efb49
00:44:40.676721 INFO  Created a commit with 2 changed file(s)
00:44:41.188863 INFO  Created a branch (delete-file-ghcp-7)

Example 3. Update a branch

suzuki-shunsuke/test-github-action@0f3b315

$ ghcp commit -r suzuki-shunsuke/test-github-action -m "try to delete file with ghcp" -b delete-file-ghcp-6 -d README.md
00:47:09.978218 INFO  Author and committer: suzuki-shunsuke
00:47:09.978882 INFO  Updating the branch (delete-file-ghcp-6) by fast-forward
00:47:10.285145 INFO  Created tree 30116ec6fda19600059a1f0e762f5a38326afe92
00:47:10.696771 INFO  Created commit 0f3b315ffd9ba54c8c67af17c5b40c653f705ef7
00:47:11.103864 INFO  Created a commit with 1 changed file(s)
00:47:11.599428 INFO  Updated the branch (delete-file-ghcp-6)

[suzuki-shunsuke]

TODO: Add unit tests