Use default files for default user profiles

vendor/user_profile.ps1.default

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+# Use this file to run your own startup commands
+
+## Prompt Customization
+<#
+.SYNTAX
+    <PrePrompt><CMDER DEFAULT>
+    λ <PostPrompt> <repl input>
+.EXAMPLE
+    <PrePrompt>N:\Documents\src\cmder [master]
+    λ <PostPrompt> |
+#>
+
+[ScriptBlock]$PrePrompt = {
+
+}
+
+# Replace the cmder prompt entirely with this.
+# [ScriptBlock]$CmderPrompt = {}
+
+[ScriptBlock]$PostPrompt = {
+
+}
+
+## <Continue to add your own>
+