Positron doesn't need restart for git pane

NEWS.md

@@ -1,5 +1,7 @@
 # usethis (development version)
 
+* `use_git()` no longer asks if you want to restart RStudio when using Positron.
+
 * `use_test()` and `use_r()` now work when you are in `tests/testthat/_snaps/{foo}.md` (@olivroy, #1988).
 
 * The URLs baked into the badge generated by `use_coverage(type = "codecov")`

R/git.R

@@ -22,7 +22,7 @@ use_git <- function(message = "Initial commit") {
     git_ask_commit(message, untracked = TRUE)
   }
 
-  if (needs_init) {
+  if (needs_init && !is_positron()) {
     restart_rstudio("A restart of RStudio is required to activate the Git pane.")
   }
 

R/positron.R

@@ -0,0 +1,3 @@
+is_positron <- function() {
+  Sys.getenv("POSITRON") == "1"
+}