feat: ignore gen/schemas for --beta templates (#647)

Author: amrbashir

.changes/ignore-schema-directory.md

@@ -0,0 +1,7 @@
+---
+"create-tauri-app": "patch"
+"create-tauri-app-js": "patch"
+---
+
+Ignore `gen/schemas` directory for `--beta` templates.
+

templates/_base_/src-tauri/_gitignore

@@ -2,3 +2,6 @@
 # will have compiled files and executables
 /target/
 
+# Generated by Tauri
+# will have schema files for capabilities auto-completion
+/gen/schemas