feat(shell): major refactor around history and completion setup

Biggest change is embracing fzf for all shell completion. This includes
using tmux popup windows to effectively render completions as floating
popups with fuzzy matching via fzf.

Shell history has also been improved, with appending each command to the
history file one by one, rather than only at end of a shell session when
the shell exists. This should ensure I don't have any more lost commands
cause the shell didn't exit cleanly.

config/mise/config.toml

@@ -25,6 +25,7 @@ show_tools = false
 "cargo:hwatch" = "latest"
 "cargo:jwt-cli" = "latest"
 "cargo:kubectl-watch" = "latest"
+"cargo:paper-terminal" = "latest"
 "cargo:sccache" = "latest"
 "cargo:tlrc" = "latest"
 "cargo:ubi" = "latest"
@@ -93,6 +94,7 @@ ruby = "latest"
 shellcheck = "latest"
 shfmt = "latest"
 starship = "latest"
+talosctl = "latest"
 terraform = "latest"
 tflint = "latest"
 usage = "latest"