add help file, and docs (#59)

* idk how good this idea is

* this could be working but i still cant figure out how to run it

* ignore tags that mini.doc gens, but why?

* chore(taskfile): force exiting after tests

because i got infinit ci

* chore(ci): add more nvim versions to run on

* chore: update taskfile

* feat: add docs generator

* docs: its only begining

* refactor: update docgen script

* docs: write some more

* docs(config): update

* docs: update readme

* language

* hope it would work

* what about that?

* maybe this would work?

* update md

* upd

* WHY DOESNT IT WORKING

* idk by but 0.9.3 just fails the ci, so i deleted it from suite

* again update, why does markdown not work in embeded html

* maybe it can help?

* upd

* again update

* kinda fix

* fix: formatting

* again some updating

* some readme updating

* fix, this shouldnt be in repo

* i finnaly undertood how to fix this fking skill issue

* fix(struct_tags): typo

* refactor(docs): change the order in generated file

* docs: install deps

* refactor(scripts): rename doc-gen script

* docs(impl): write docs

* docs(dap): add doc

* stylua .

* docs(struct_tags): add doc

* docs(gotests): add docs

* docs(iferr): add docs

* docs(comment): add doc

* update CONTRIBUTING.md

* docs(README): talk about `develop` branch

* docs: update README.md

scripts/docgen.lua

@@ -0,0 +1,33 @@
+---@diagnostic disable: undefined-global
+--# selene: allow(undefined_variable)
+
+local okay, minidoc = pcall(require, "mini.doc")
+if not okay then
+  error "mini.doc not found, please install it. https://github.com/echasnovski/mini.doc"
+  return
+end
+
+local files = {
+  "lua/gopher/init.lua",
+  "lua/gopher/config.lua",
+  "lua/gopher/struct_tags.lua",
+  "lua/gopher/impl.lua",
+  "lua/gopher/gotests.lua",
+  "lua/gopher/iferr.lua",
+  "lua/gopher/comment.lua",
+  "lua/gopher/dap.lua",
+}
+
+minidoc.setup()
+
+local hooks = vim.deepcopy(minidoc.default_hooks)
+hooks.write_pre = function(lines)
+  -- Remove first two lines with `======` and `------` delimiters to comply
+  -- with `:h local-additions` template
+  table.remove(lines, 1)
+  table.remove(lines, 1)
+
+  return lines
+end
+
+MiniDoc.generate(files, "doc/gopher.nvim.txt", { hooks = hooks })