[not urgent] enable treesitter parsing by default

docs/docs/getting-started/configuration-options.md

@@ -93,6 +93,11 @@ Here is a full example of setting up the Kulala plugin with the available `opts`
     -- set scope for environment and request variables
     -- possible values: b = buffer, g = global
     environment_scope = "b",
+
+    -- by default, requests are parsed using treesitter if an http parser is available.
+    -- if you encounter tree-sitter related issues, you can disable this feature
+    -- by setting this option to false (and then open an issue on GitHub!)
+    treesitter = true,
   },
 }
 ```

lua/kulala/config/init.lua

@@ -1,6 +1,18 @@
 local FS = require("kulala.utils.fs")
 local M = {}
 
+-- enable treesitter parsing by default if http parser is available
+local treesitter_default = false
+local ok, parsers = pcall(require, "nvim-treesitter.parsers")
+if ok then
+  for _, parser in pairs(parsers.available_parsers()) do
+    if parser == "http" then
+      treesitter_default = true
+      break
+    end
+  end
+end
+
 M.defaults = {
   -- split direction
   -- possible values: "vertical", "horizontal"
@@ -64,7 +76,7 @@ M.defaults = {
   -- enable reading vscode rest client environment variables
   vscode_rest_client_environmentvars = false,
   -- parse requests with tree-sitter
-  treesitter = false,
+  treesitter = treesitter_default,
   -- disable the vim.print output of the scripts
   -- they will be still written to disk, but not printed immediately
   disable_script_print_output = false,

lua/kulala/parser/treesitter.lua

@@ -1,7 +1,3 @@
-if not pcall(require, "nvim-treesitter") then
-  return nil
-end
-
 local CONFIG = require("kulala.config")
 local FS = require("kulala.utils.fs")
 local STRING_UTILS = require("kulala.utils.string")