add api docs for /repos/:owner/:repo/git/trees/:sha #6 (#7)

* add api docs for /repos/:owner/:repo/git/trees/:sha #6

This PR adds the docs for the git repo tress endpoint.

* Update and rename Repositories/Tree.md to Git Data/Trees.md

* Update README.md

Co-authored-by: ᴜɴᴋɴᴡᴏɴ <[email protected]>

Author: bharatnc

Git Data/Trees.md

@@ -0,0 +1,37 @@
+# Git Trees
+
+## Get a tree
+
+```
+GET /repos/:owner/:repo/git/trees/:sha
+```
+
+### Response
+
+```
+Status: 200 OK
+```
+```json
+{
+  "sha": "c59441ded1549b149def0d4c54594d31a7f3718f",
+  "url": "http://localhost:3000/api/v1/repos/root/testrepo/git/trees/c59441ded1549b149def0d4c54594d31a7f3718f",
+  "tree": [
+    {
+      "path": "LICENSE",
+      "mode": "120000",
+      "type": "blob",
+      "size": 1077,
+      "sha": "472ac2361b65136b393d652de25341e2ea44f299",
+      "url": "http://localhost:3000/api/v1/repos/root/testrepo/git/trees/472ac2361b65136b393d652de25341e2ea44f299"
+    },
+    {
+      "path": "README.md",
+      "mode": "120000",
+      "type": "blob",
+      "size": 12,
+      "sha": "70fcb456d436f08462602f26df6fb7e167e7a916",
+      "url": "http://localhost:3000/api/v1/repos/root/testrepo/git/trees/70fcb456d436f08462602f26df6fb7e167e7a916"
+    }
+  ]
+}
+```

README.md

@@ -28,11 +28,14 @@ If you have any questions or concern, please [file an issue](https://github.com/
   - [Commits](Repositories/Commits.md)
   - [Contents](Repositories/Contents.md)
   - [Deploy Keys](Repositories/Deploy%20Keys.md)
+  - [Tree](Repositories/Tree.md)
   - [Webhooks](Repositories/Webhooks.md)
 - [Users](Users)
   - [Emails](Users/Emails.md)
   - [Followers](Users/Followers.md)
   - [Public Keys](Users/Public%20Keys.md)
+- [Git Data](Git%20Data)
+  - [Trees](Git%20Data/Trees.md)
 
 ## Installation