* lisp/progmodes/lua-ts-mode.el (lua-ts-mode): Move property
highlighting to level 4.
(lua-ts--keywords): Remove `true', `false' and `nil' from
keywords.
(lua-ts--font-lock-settings): Highlight assignments, functions
and labels in more places. Distinguish comment delimiters.
(lua-ts--comment-font-lock): New function.
* lisp/progmodes/lua-ts-mode.el (lua-ts-mode): Include require
statements and remove anonymous entries.
(lua-ts--named-function-p, lua-ts--require-name-function)
(lua-ts--require-p): New functions.
* lisp/speedbar.el (speedbar-supported-extension-expressions):
Add Lua to the list of supported file types. (Bug#66465)
* lisp/progmodes/lua-ts-mode.el (lua-ts-mode): Improve movement.
(lua-ts--simple-indent-rules): Improve indentation rules.
(lua-ts-mode-map): Add key bindings and menus.
(lua-ts-mode-hook): Make hook available in Customize.
(lua-ts-inferior-history, lua-ts-inferior--write-history): Add option
to read/write an input history file.
(lua-ts-inferior-lua, lua-ts-send-buffer, lua-ts-send-file)
(lua-ts-send-region, lua-ts-inferior-prompt)
(lua-ts-inferior-prompt-continue): Support for sending buffer,
file or region to the inferior process.
(lua-ts-show-process-buffer, lua-ts-hide-process-buffer)
(lua-ts-kill-process): New functions.
(lua-ts-inferior-prompt-regexp): Remove option.
* test/lisp/progmodes/lua-ts-mode-resources/indent.erts:
* test/lisp/progmodes/lua-ts-mode-resources/movement.erts: Add
tests.
* lisp/progmodes/lua-ts-mode.el (lua-ts--font-lock-settings):
Identify functions and assignments in more places. Use constant
face for goto/labels. (Bug#66162)
