feat: install workspace backend config template

resources/workspace-backend.default.toml

@@ -0,0 +1,45 @@
+# Workspace Backend local config template.
+#
+# Copied to `.yoi/workspace-backend.default.toml` during workspace init.
+# Copy that file to `.yoi/workspace-backend.local.toml` and edit it.
+# The `.local` file is intentionally git-ignored.
+#
+# Omit a key to use the built-in default. TOML has no `null`, so optional
+# settings are represented by leaving the key commented out.
+
+[server]
+# Backend HTTP/WebSocket listen address.
+listen = "127.0.0.1:8787"
+
+# Browser-facing frontend URL used by local tooling/display.
+frontend_url = "http://127.0.0.1:5173"
+
+# Static SPA build directory override. Leave commented for dev/API-only mode.
+# Relative paths are resolved from the workspace root.
+# static_assets_dir = "web/workspace/dist"
+
+[data]
+# Backend data root override. Leave commented to use the user-data default:
+#   <data_dir>/workspace-server/<workspace_id>/
+# Relative paths are resolved from the workspace root.
+# root = ".yoi/workspace-backend.data"
+
+# Explicit control-plane SQLite DB path override.
+# If omitted, this defaults to `<data.root>/workspace.db`.
+# workspace_database_path = ".yoi/workspace-backend.data/workspace.db"
+
+# Explicit embedded Runtime fs-store root override.
+# If omitted, this defaults to `<data.root>/embedded-runtime`.
+# embedded_runtime_store_root = ".yoi/workspace-backend.data/embedded-runtime"
+
+[limits]
+max_records = 200
+
+# Remote Runtime sources. Token values must not be written here.
+# Use token_ref only after secret-ref resolution is implemented for this config.
+#
+# [[runtimes.remote]]
+# id = "example"
+# endpoint = "http://127.0.0.1:8790"
+# display_name = "Example Runtime"
+# token_ref = "local:example-runtime-token"