ox-latex: add `options' latex attribute to tables

* lisp/ox-latex.el (org-latex--org-table): The `:options' LaTeX
attribute allows adding an optional argument (`\begin{env}[opt]'),
since certain tabular environments, such as `longtblr', accept optional
arguments.
* doc/org-manual.org (Tables in LaTeX export): this feature in the manual.
* etc/ORG-NEWS (New :options attribute when exporting tables to
LaTeX): this feature in `ORG-NEWS'.

doc/org-manual.org

@@ -13572,6 +13572,14 @@ include:
   The LaTeX export back-end uses these attributes for regular tables
   to set their alignments, fonts, and widths.
 
+- =:options= ::
+
+  The =:options= attribute allows adding an optional argument with
+  a list of various table options (between brackets in LaTeX export),
+  since certain tabular environments, such as longtblr of the
+  tabularray LaTeX package, provides this structure.  For example:
+  =:options remark{Note}={note},remark{Source}={source}=.
+
 - =:spread= ::
 
   When =:spread= is non-~nil~, the LaTeX export back-end spreads or
@@ -19770,6 +19778,7 @@ moves across a special context.
               (add-to-list 'org-tab-first-hook 'yas/org-very-safe-expand)
               (define-key yas/keymap [tab] 'yas/next-field)))
   #+end_src
+
 ** Using Org on a TTY
 :PROPERTIES:
 :DESCRIPTION: Using Org on a tty.

etc/ORG-NEWS

@@ -53,6 +53,13 @@ structures is supported.  Storing references between different
 variables is also supported (see =:inherit= key in
 ~org-persist-register~).
 
+*** New =:options= attribute when exporting tables to LaTeX
+
+The =:options= attribute allows adding an optional argument with a
+list of various table options (between brackets in LaTeX export),
+since certain tabular environments, such as longtblr of the
+tabularray LaTeX package, provides this structure.
+
 ** New functions and changes in function arguments
 
 *** New function ~org-element-cache-map~ for quick mapping across Org elements
@@ -1555,6 +1562,7 @@ the headline to use for making the table of contents.
 ,* Another section
 ,#+TOC: headlines 1 :target "#TargetSection"
 #+end_example
+
 ** New functions
 *** ~org-dynamic-block-insert-dblock~
 
@@ -1845,6 +1853,7 @@ CIDER version which has not =sesman= integrated, only has
 (dissoc Clojure 'JVM)
 (conj clojurists "stardiviner")
 #+end_src
+
 *** Add ~:results link~ support for Babel
 
 With this output format, create a link to the file specified in
@@ -1863,14 +1872,17 @@ wget -c "https://ben.akrin.com/crackzor/crackzor_1.0.c.gz"
 #+begin_src js :session "*Javascript REPL*"
 console.log("stardiviner")
 #+end_src
+
 *** Add ~:session~ support of ob-js for Indium
 #+begin_src js :session "*JS REPL*"
 console.log("stardiviner")
 #+end_src
+
 *** Add ~:session~ support of ob-js for skewer-mode
 #+begin_src js :session "*skewer-repl*"
 console.log("stardiviner")
 #+end_src
+
 *** Add support for links to LaTeX equations in HTML export
 Use MathJax links when enabled (by ~org-html-with-latex~), otherwise
 add a label to the rendered equation.
@@ -1957,6 +1969,7 @@ you should expect to see something like:
 #+BEGIN_EXAMPLE
   ,#+STARTUP: shrink
 #+END_EXAMPLE
+
 *** Allow to filter by tags/property when capturing colview
 
 You can now use =:match= to filter entries using a todo/tags/properties
@@ -2339,6 +2352,7 @@ To use =vertica= in an sql =SRC_BLK= set the =:engine= like this:
   SELECT * FROM nodes;
   ,#+END_SRC
 #+END_EXAMPLE
+
 **** C++: New header ~:namespaces~
 
 The new ~:namespaces~ export option can be used to specify namespaces

lisp/ox-latex.el

@@ -3314,6 +3314,7 @@ This function assumes TABLE has `org' as its `:type' property and
 `table' as its `:mode' attribute."
   (let* ((attr (org-export-read-attribute :attr_latex table))
 	 (alignment (org-latex--align-string table info))
+         (opt (org-export-read-attribute :attr_latex table :options))
 	 (table-env (or (plist-get attr :environment)
 			(plist-get info :latex-default-table-environment)))
 	 (width
@@ -3343,8 +3344,9 @@ This function assumes TABLE has `org' as its `:type' property and
 		(format "\\end{%s}" table-env)
 		(and fontsize "}"))))
      (t
-      (let ((output (format "\\begin{%s}%s{%s}\n%s\\end{%s}"
+      (let ((output (format "\\begin{%s}%s%s{%s}\n%s\\end{%s}"
 			    table-env
+                            (if opt (format "[%s]" opt) "")
 			    width
 			    alignment
 			    contents