feat(lua): enable(enable:boolean, filter:table) #28374

Problem:
We need to establish a pattern for `enable()`.

Solution:
- First `enable()` parameter is always `enable:boolean`.
- Update `vim.diagnostic.enable()`
- Update `vim.lsp.inlay_hint.enable()`.
    - It was not released yet, so no deprecation is needed. But to help
      HEAD users, it will show an informative error.
- vim.deprecate():
    - Improve message when the "removal version" is a *current or older* version.

runtime/lua/vim/_editor.lua

@@ -1049,10 +1049,11 @@ function vim.deprecate(name, alternative, version, plugin, backtrace)
     plugin = { plugin, 'string', true },
   }
   plugin = plugin or 'Nvim'
+  local will_be_removed = 'will be removed'
 
   -- Only issue warning if feature is hard-deprecated as specified by MAINTAIN.md.
-  -- e.g., when planned to be removed in version = '0.12' (soft-deprecated since 0.10-dev),
-  -- show warnings since 0.11, including 0.11-dev (hard_deprecated_since = 0.11-dev).
+  -- Example: if removal_version is 0.12 (soft-deprecated since 0.10-dev), show warnings starting at
+  -- 0.11, including 0.11-dev (hard_deprecated_since = 0.11-dev).
   if plugin == 'Nvim' then
     local current_version = vim.version() ---@type vim.Version
     local removal_version = assert(vim.version.parse(version))
@@ -1075,14 +1076,17 @@ function vim.deprecate(name, alternative, version, plugin, backtrace)
 
     if not is_hard_deprecated then
       return
+    elseif current_version >= removal_version then
+      will_be_removed = 'was removed'
     end
   end
 
   local msg = ('%s is deprecated'):format(name)
   msg = alternative and ('%s, use %s instead.'):format(msg, alternative) or (msg .. '.')
-  msg = ('%s%s\nThis feature will be removed in %s version %s'):format(
+  msg = ('%s%s\nFeature %s in %s %s'):format(
     msg,
     (plugin == 'Nvim' and ' :help deprecated' or ''),
+    will_be_removed,
     plugin,
     version
   )