feat(cs): add initial git doc

site/cs/tools/git.typ

@@ -0,0 +1,85 @@
+#import "/lib/lib.typ": *
+#set document(title: [Git])
+#metadata((
+  title: "Git",
+  translation_key: "git",
+  summary: "What's git and lot of usefull command"
+)) <website-metadata>
+#calepin.setup(eval: false)
+
+= What's Git
+This is git
+
+= Bascis command
+TODO:
+- fetch
+- pull
+- push
+- commit (with sign)
+- checkout
+- rebase
+
+
+= Config
+Git config live in `~/.gitconfig`
+
+== User
+In User section, we can specify default `name` and `email`:
+```yaml
+[user]
+  name = Rémi Heredero
+  email = remi@heredero.ch
+```
+
+== Signing
+To sign commit and tag by default, you can set the flag on the configfile:
+```yaml
+[commit]
+  gpgsign = true
+[tag]
+  gpgSign = true
+```
+You also probably want to specify your default gpg key in the user section:
+```yaml
+[user]
+  signingkey = 4A8C1907D8B15B47
+```
+
+Sometime (often in windows), you need to specify the path of the gpg program with:
+```yaml
+[gpg]
+  program = C:/Users/her/dev/GnuPG/bin/gpg.exe
+```
+
+== Default editor
+You can define a default editor to edit commit message or solve conflict. In my case, my favourite code editor is Zed, so:
+```yaml
+[core]
+  editor = zed --wait
+```
+
+== Include If
+You maybe want a different config for some repo. It's easy to do that with `includeIf`. You can define a gitconfig overlay to apply to a specific repository:
+```yaml
+[includeIf "gitdir:<path-to-work-repo>"]
+  path = ~/.gitconfig-work
+```
+= Advanced command
+
+== Reset author
+If you didn't use the right config for commiting somewhere, you can reset the author of commit with the following command.
+
+=== Single commit
+```sh
+git commit --amend --no-edit --reset-author
+```
+
+=== Entire project history
+```sh
+git rebase -r --root --exec "git commit --amend --no-edit --reset-author"
+```
+
+=== From a specific commit
+```sh
+git rebase -r <hash> --exec "git commit --amend --no-edit --reset-author"
+```