feat: insert & open obsidian excalidraw drawings

lua/typstar/config.lua

@@ -0,0 +1,21 @@
+local M = {}
+
+local default_config = {
+    typstarRoot = '~/typstar',
+    excalidraw = {
+        assetsDir = 'assets',
+        filename = 'drawing-%Y-%m-%d-%H-%M-%S',
+        fileExtensionInserted = '.excalidraw.svg',
+        obsidianOpenConfig = nil,
+    }
+}
+
+function M.merge_config(args)
+    M.config = vim.tbl_deep_extend('force', default_config, args or {})
+    M.config.excalidraw.obsidianOpenConfig = M.config.excalidraw.obsidianOpenConfig or
+        M.config.typstarRoot .. '/res/obsidian_open_config_example.json'
+end
+
+M.merge_config(nil)
+
+return M