chore: bump minimal Nvim version to 0.7 and check

Checks minimal version in `:checkhealth nvim-treesitter`

Also recommend nightlies

README.md

@@ -63,7 +63,7 @@ For more detailed information on setting these up, see ["Advanced setup"](#advan
 
 ## Requirements
 
-- Neovim latest stable version or [nightly](https://github.com/neovim/neovim#install-from-source)
+- **Neovim 0.7.0 or later** (latest [nightly](https://github.com/neovim/neovim#install-from-source) recommended)
 - `tar` and `curl` in your path (or alternatively `git`)
 - A C compiler in your path and libstdc++ installed ([Windows users please read this!](https://github.com/nvim-treesitter/nvim-treesitter/wiki/Windows-support)).
 
@@ -387,7 +387,7 @@ Once the parser is installed, you can update it (from the latest revision of the
 Note that neither `:TSInstall` nor `:TSInstallFromGrammar` copy query files from the grammar repository.
 If you want your installed grammar to be useful, you must manually [add query files](#adding-queries) to your local nvim-treesitter installation.
 Note also that module functionality is only triggered if your language's filetype is correctly identified.
-If Neovim does not detect your language's filetype by default, you can use [Neovim's `vim.filetype.add()`](https://neovim.io/doc/user/lua.html#vim.filetype.add()) (0.7.0 and above) to add a custom detection rule.
+If Neovim does not detect your language's filetype by default, you can use [Neovim's `vim.filetype.add()`](https://neovim.io/doc/user/lua.html#vim.filetype.add()) to add a custom detection rule.
 
 If you use a git repository for your parser and want to use a specific version, you can set the `revision` key
 in the `install_info` table for you parser config.

lua/nvim-treesitter/health.lua

@@ -19,6 +19,10 @@ local NVIM_TREESITTER_MINIMUM_ABI = 13
 local function install_health()
   health_start "Installation"
 
+  if fn.has "nvim-0.7" == 0 then
+    health_error "Nvim-treesitter requires Neovim 0.7.0+"
+  end
+
   if fn.executable "tree-sitter" == 0 then
     health_warn(
       "`tree-sitter` executable not found (parser generator, only needed for :TSInstallFromGrammar,"