* lisp/textmodes/markdown-ts-mode.el (markdown-ts--treesit-settings):
Use @italic on the whole 'block_quote'.
(markdown-ts-outline-predicate): New function.
(markdown-ts--range-settings): Embed 'yaml' in host 'markdown',
embed 'toml' in host 'markdown', embed 'html' in host 'markdown-inline',
and use local 'html_block'.
(markdown-ts-setup): Append html/yaml/toml to treesit-font-lock-settings
and treesit-font-lock-feature-list when their grammars are ready.
(markdown-ts-mode): Set comment-start/comment-end.
Set treesit-outline-predicate to 'markdown-ts-outline-predicate'.
* lisp/textmodes/toml-ts-mode.el
(toml-ts-mode--font-lock-feature-list): New variable.
(toml-ts-mode): Use it.
* lisp/textmodes/yaml-ts-mode.el
(yaml-ts-mode--font-lock-feature-list): New variable.
(yaml-ts-mode): Use it.
(yaml-ts-mode--outline-nodes): New variable.
(yaml-ts-mode--outline-predicate): Use it.
* lisp/treesit-x.el (liquid-generic-ts-mode):
Use 'treesit-ready-p' on optional 'yaml' grammar.
Merge 'yaml-ts-mode--font-lock-feature-list'.
* lisp/treesit-x.el (define-treesit-generic-mode): Add keyword
':copy-queries t' to the end of 'source'.
* lisp/treesit.el (treesit-language-source-alist):
Document the keyword ':copy-queries'.
(treesit--install-language-grammar-1): Add &rest args.
Process the keyword args. Call 'treesit--copy-queries'
when :copy-queries is non-nil.
(treesit--copy-queries): Add arg 'source-dir'. Copy queries
from source-dir as well. Copy only the file "highlights.scm".
(define-treesit-generic-mode): Append new item
to 'treesit-language-source-alist' instead of prepending.
(treesit-generic-mode-setup): Remove 'source' arg.
Use 'treesit-ensure-installed'.
(liquid-generic-ts-mode): Use 'treesit-ensure-installed'.
(alpinejs-generic-ts-setup): Run setup hook.
(treesit-generic-mode-font-lock-map): Add more mappings.
* lisp/treesit.el (treesit-replace-font-lock-feature-settings):
Check the query language in addition to checking the feature.
(treesit-font-lock-fontify-region): Use treesit-font-lock-setting-*
accessors.
* lisp/treesit-x.el (treesit-generic-mode-setup): Append new
font-lock rules to an existing treesit-font-lock-settings
possibly inherited from the parent.
(treesit-generic-mode-setup): Use treesit-merge-font-lock-feature-list
to merge with an existing feature list inherited from the parent.
(liquid-generic-ts-mode): New treesit generic mode.
(alpinejs-generic-ts-setup): New treesit generic setup.
(treesit-generic-mode-list): Remove variable.
(define-treesit-generic-mode): Remove docstring text about hook
that is already added by 'define-derived-mode'.
(treesit-generic-mode): Remove command.
