feat: improve formatter and attribute block handling

- Format multi-line assignments with proper alignment
- Format FB calls in multiline style with parameter alignment
- Auto-expand collapsed attribute blocks before save
- Rename command from LspSCLFormat to SCLFormat
- Condense AGENTS.md and add testing section with reference project

lua/scl_lsp/init.lua

@@ -34,9 +34,8 @@ function M.setup(opts)
         end
         
         if opts.lsp and opts.lsp.formatting then
-          vim.api.nvim_buf_create_user_command(b, "LspSCLFormat", function()
+          vim.api.nvim_buf_create_user_command(b, "SCLFormat", function()
             vim.lsp.buf.format({ name = "scl_lsp" })
-            -- Clear attr_toggle state since line positions may have changed
             local ok, at = pcall(require, "scl.attr_toggle")
             if ok then
               at.clear_buffer_state(vim.api.nvim_get_current_buf())
@@ -56,9 +55,8 @@ function M.setup(opts)
   })
   
   -- Create global format command (works on current buffer)
-  vim.api.nvim_create_user_command("LspSCLFormat", function()
+  vim.api.nvim_create_user_command("SCLFormat", function()
     vim.lsp.buf.format({ name = "scl_lsp" })
-    -- Clear attr_toggle state since line positions may have changed
     local ok, at = pcall(require, "scl.attr_toggle")
     if ok then
       at.clear_buffer_state(vim.api.nvim_get_current_buf())