editors syntax highlighting ...

- emacs syntax: add tree-sitter major mode for SiSU spine markup
  New file sisu-spine-ts-mode.el is a sibling of the existing regex
  mode, backed by Emacs 29+'s built-in treesit.el and the
  tree-sitter-sisu grammar. It replaces the long font-lock keyword list
  with treesit-font-lock-rules grouped into eight features (comment,
  header, heading, block, inline, note, link, index, misc) so users
  can dial verbosity via treesit-font-lock-level. It also wires up:
  - treesit-simple-imenu-settings for a heading outline,
  - treesit-thing-settings for sentence / paragraph motions,
  - treesit-defun-type-regexp so C-M-a / C-M-e jump heading-to-heading,
  - a sisu-spine-ts-install-grammar command that registers
    treesit-language-source-alist and runs
    treesit-install-language-grammar so users can install the parser
    from inside Emacs without leaving the editor.

- the original sisu-spine-mode.el is unchanged and supported for
  Emacs < 29 and for users who prefer regex highlighting.

- nvim drop-in: point parser fetch at tools/tree-sitter-sisu
  sundry/editor-syntax-etc/nvim/
  The nvim-treesitter install_info now fetches the parser from
  https://git.sisudoc.org/projects/tree-sitter-sisu which can be cloned
  via git://git.sisudoc.org/tools/tree-sitter-sisu The fetched paths:
    files = { "src/parser.c", "src/scanner.c" }
  submission of the sisu parser to nvim-treesitter's parsers.lua should
  be a near-trivial one-liner.

- the original vim regex highlighter remains as before
  - sundry/editor-syntax-etc/vim/syntax/sisu-spine.vim
  - sundry/editor-syntax-etc/vim/templates/{sst,ssm,ssi}.tpl
    new skeleton templates for the three SiSU markup file types
    sets up the YAML header (title, creator, date, rights, classify,
    identfier)

- .gitignore - whitelist the new files

(assisted by Claude-Code)

1 files changed, 16 insertions, 0 deletions

diff --git a/sundry/editor-syntax-etc/nvim/queries/sisu/injections.scm b/sundry/editor-syntax-etc/nvim/queries/sisu/injections.scm
new file mode 100644
index 0000000..27f622b
--- /dev/null
+++ b/sundry/editor-syntax-etc/nvim/queries/sisu/injections.scm
@@ -0,0 +1,16 @@
+; Language injection queries for SiSU Spine markup
+;
+; Code blocks could potentially inject language-specific highlighting,
+; but SiSU code blocks don't specify language. These queries are
+; provided as a starting point for future extension.
+
+; Code block content could be injected with a specific language
+; if the block type or context provides a hint.
+; For now, raw content in code blocks is left unhighlighted.
+
+; Example: if code blocks specified a language, e.g. code(d){
+; ((code_block_curly
+;   open: (block_open) @_open
+;   content: (raw_content) @injection.content)
+;  (#match? @_open "code\\(d\\)")
+;  (#set! injection.language "d"))