feat(terminal): follow output by default with :TerminalFollow toggledev

When follow mode is on for a terminal buffer, leaving terminal mode
jumps to the bottom (G) so the view tracks the latest output. It is a
buffer-scoped toggle, on by default for new terminals.

- Add :TerminalFollow command and <Leader>F mapping toggling
  vim.b.terminal_follow
- A TermLeave autocmd does the G when the flag is set; TermOpen enables
  it by default
- Show the state as a +T flag in the statusline

1 files changed, 3 insertions, 1 deletions

diff --git a/plugin/50-color.lua b/plugin/50-color.lua
index 4cdbad0..c88e34b 100644
--- a/plugin/50-color.lua
+++ b/plugin/50-color.lua
@@ -80,11 +80,13 @@ local function spell_status()
 end
 
 --[[ Custom status flags: `+F` when formatting is on for the buffer, `+H` when LSP inlay hints are on,
-`+R` when disk-change autoreload is enabled (see 50-autoreload.lua), followed by the spell flag. ]]
+`+R` when disk-change autoreload is enabled (see 50-autoreload.lua), `+T` when terminal follow is on
+(see :TerminalFollow), followed by the spell flag. ]]
 local function statuses()
 	return (vim.b.format and "+F" or "")
 		.. (vim.lsp.inlay_hint.is_enabled({ bufnr = 0 }) and "+H" or "")
 		.. (vim.g.autoreload and "+R" or "")
+		.. (vim.b.terminal_follow and "+T" or "")
 		.. (vim.o.spell and spell_status() or "")
 end