git: Make inline blame padding configurable (#33631)

Just like with diagnostics, adding a configurable padding to inline
blame

Release Notes:

- Added configurable padding to inline blame

---------

Co-authored-by: Cole Miller <cole@zed.dev>
Co-authored-by: Peter Tripp <petertripp@gmail.com>

docs/src/configuring-zed.md

@@ -1795,7 +1795,6 @@ Example:
 {
   "git": {
     "inline_blame": {
-      "enabled": true,
       "delay_ms": 500
     }
   }
@@ -1808,7 +1807,6 @@ Example:
 {
   "git": {
     "inline_blame": {
-      "enabled": true,
       "show_commit_summary": true
     }
   }
@@ -1821,13 +1819,24 @@ Example:
 {
   "git": {
     "inline_blame": {
-      "enabled": true,
       "min_column": 80
     }
   }
 }
 ```
 
+5. Set the padding between the end of the line and the inline blame hint, in ems:
+
+```json
+{
+  "git": {
+    "inline_blame": {
+      "padding": 10
+    }
+  }
+}
+```
+
 ### Hunk Style
 
 - Description: What styling we should use for the diff hunks.