chore: add placeholder to git config inputs (#694)

Shows a placeholder of default values in the parameter input box

registry/coder/modules/git-config/README.md

@@ -14,7 +14,7 @@ Runs a script that updates git credentials in the workspace to match the user's
 module "git-config" {
   count    = data.coder_workspace.me.start_count
   source   = "registry.coder.com/coder/git-config/coder"
-  version  = "1.0.32"
+  version  = "1.0.33"
   agent_id = coder_agent.main.id
 }
 ```
@@ -29,7 +29,7 @@ TODO: Add screenshot
 module "git-config" {
   count              = data.coder_workspace.me.start_count
   source             = "registry.coder.com/coder/git-config/coder"
-  version            = "1.0.32"
+  version            = "1.0.33"
   agent_id           = coder_agent.main.id
   allow_email_change = true
 }
@@ -43,7 +43,7 @@ TODO: Add screenshot
 module "git-config" {
   count                 = data.coder_workspace.me.start_count
   source                = "registry.coder.com/coder/git-config/coder"
-  version               = "1.0.32"
+  version               = "1.0.33"
   agent_id              = coder_agent.main.id
   allow_username_change = false
   allow_email_change    = false

registry/coder/modules/git-config/main.tf

@@ -44,6 +44,9 @@ data "coder_parameter" "user_email" {
   description  = "Git user.email to be used for commits. Leave empty to default to Coder user's email."
   display_name = "Git config user.email"
   mutable      = true
+  styling = jsonencode({
+    placeholder = data.coder_workspace_owner.me.email
+  })
 }
 
 data "coder_parameter" "username" {
@@ -55,6 +58,9 @@ data "coder_parameter" "username" {
   description  = "Git user.name to be used for commits. Leave empty to default to Coder user's Full Name."
   display_name = "Full Name for Git config"
   mutable      = true
+  styling = jsonencode({
+    placeholder = coalesce(data.coder_workspace_owner.me.full_name, data.coder_workspace_owner.me.name)
+  })
 }
 
 resource "coder_env" "git_author_name" {