sync develop with main (#119)

* chore: remove unused rules from nvim selene setup

* test: add test for config

* chore: update tasks, run tests on all recent versions

* refactor(test): make helper test function more ergonomic

In my opinion, requiring user to access tests via `T["module_name"]`
was too fragile and typos prone.

* fix(config): typo annotations

* chore(ci): install go bins via gopher.nvim itself

* feat(struct_tags): add range support (#117)

* feat(struct_tags): add range support

* refactor: use `start`, and `end_` naming for ranges

* fix(testutils): validate provided cursor position

* chore: update CONTRIBUTING.md

* chore: add demos (#118)

* chore: add dataset for demos

* chore(demos): add demos

* chore: update CONTRIBUTING

* this copefully will fix comments gif

* chore: add note about lazy loading

* chore(readme): at this point there is no code from go.nvim or iferr

* chore(readme): update the structure

* chore(readme): change wording of some things

spec/testutils.lua

@@ -6,9 +6,11 @@ local testutils = {}
 testutils.mininit_path = vim.fs.joinpath(base_dir, "scripts", "minimal_init.lua")
 testutils.fixtures_dir = vim.fs.joinpath(base_dir, "spec/fixtures")
 
----@param name string
----@return MiniTest.child, table
-function testutils.setup(name)
+---@param mod string Module name for which to create a nested test set.
+---@return MiniTest.child child nvim client.
+---@return table T root test set created by `MiniTest.new_set()`.
+---@return table mod_name nested set of tests in `T[mod]`.
+function testutils.setup(mod)
   local child = MiniTest.new_child_neovim()
   local T = MiniTest.new_set {
     hooks = {
@@ -19,8 +21,8 @@ function testutils.setup(name)
     },
   }
 
-  T[name] = MiniTest.new_set {}
-  return child, T
+  T[mod] = MiniTest.new_set {}
+  return child, T, T[mod]
 end
 
 ---@generic T
@@ -76,6 +78,8 @@ end
 ---@param pos? number[]
 ---@return gopher.TestUtilsSetup
 function testutils.setup_test(fixture, child, pos)
+  vim.validate("pos", pos, "table", true)
+
   local tmp = testutils.tmpfile()
   local fixtures = testutils.get_fixtures(fixture)
 
@@ -84,6 +88,8 @@ function testutils.setup_test(fixture, child, pos)
 
   local bufnr = child.fn.bufnr(tmp)
   if pos then
+    assert(#pos == 2, "invalid cursor position")
+
     child.fn.setpos(".", { bufnr, unpack(pos) })
   end