docs(render): template reference, install rules, typesetting check

colitur-templates.5 documents the four syntax forms, the six flavours
and their escaping, and the full view-model field reference. It states
plainly that there are no partials, no raw form and no expression
evaluation -- a template is data, never a program. It documents two
real hazards found during this build, not theoretical ones: the
outward scope fallback silently shadowing an inner name/num key with
an outer one of the same name (with the safe {{#name}}...{{^la}}
idiom), and the engine's lack of host-comment awareness (a {{...}}
inside a LaTeX %, groff .\" or HTML <!-- --> comment is still parsed
as a tag).

It also states the limitation rather than hiding it: AsciiDoc and
Markdown are not escaped, so a feast name containing * or _ renders as
emphasis.

templates/ and schema/ now install into <prefix>/share/colitur/,
matching data/ef/, via new install stanzas; colitur-templates.5
installs to man5 beside colitur-overlay.5. Verified against a scratch
prefix: the installed binary resolves both from the prefix, not the
source tree, when run from an unrelated working directory.

make check-templates typesets every shipped template through pdflatex
and groff when they are installed, and prints SKIPPED loudly when they
are not. Golden tests prove templates render; only this proves they
typeset. A silent skip would read as a pass.

Fixed a real doc/help drift while here: bin/main.ml's --help still said
--overlay was accepted on day and readings only, three commands out of
date (emit, table/render and publish all accept it too), disagreeing
with the man page's own OVERLAYS section, which carried the identical
stale line. Both are corrected; --overlay's own behaviour is unchanged.

1 files changed, 12 insertions, 0 deletions

diff --git a/README.md b/README.md
index 6f71f6c..aafde4e 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,18 @@ dune exec colitur -- temporal 2026  # the EF temporal cycle only, one line per d
 dune exec colitur -- day 2026       # the full resolved EF calendar (temporal + sanctoral)
 ```
 
+## Rendering
+
+```sh
+dune exec colitur -- table --year 2027 --template templates/ef/ordo.tex > ordo.tex && pdflatex ordo.tex
+dune exec colitur -- table --year 2027 --template templates/ef/grid.tex > grid.tex && pdflatex grid.tex
+dune exec colitur -- publish --from 2027 --to 2027 --out ./public
+```
+
+See `colitur-templates(5)` for the template format (syntax, escaping, the
+full field reference) and `colitur(1)` for `emit`, `table`/`render` and
+`publish` in full.
+
 ## License
 
 AGPL-3.0-or-later. See `LICENSE`.