feat: -a/-g runtime reading toggle and WRAP config option

- -a/--all and -g/--gospel override the compiled GOSPEL_ONLY default per run;
  the reading text for both is always embedded, so this is free. Flags may
  appear in any position alongside the optional date.
- WRAP config.h option wraps reading text at N columns; 0 (default) fits the
  terminal via TIOCGWINSZ and leaves piped output one line per verse. Greedy,
  space-breaking, UTF-8 aware (continuation bytes do not count as columns).
- Rework arg parsing into a small flag loop; expand -h usage.

No table/data change; OF and EF both build clean under -Wall -Wextra. Binary
grows ~4 KB (666 KB OF). Stays compile-time-first, suckless-style: the only
run-time options are the reading-set toggle and -h.

Claude-Session: https://claude.ai/code/session_01S1CD1u3tgSS4xNu6WHfp5a

1 files changed, 9 insertions, 1 deletions

diff --git a/README.md b/README.md
index e6d0556..2fea861 100644
--- a/README.md
+++ b/README.md
@@ -16,10 +16,17 @@ the Go engine that computes and generates clectio's data.
     make                      # Ordinary Form, English sigla, Latin Vulgate
     ./clectio                 # today
     ./clectio 2026-12-25      # a given date
+    ./clectio -g 2026-12-25   # the Gospel only
+    ./clectio -a              # all readings (override a Gospel-only build)
     make install              # into $PREFIX/bin (default /usr/local)
 
 Needs only a C99 compiler and libc. It builds in about a second.
 
+The only run-time options are `-a`/`--all`, `-g`/`--gospel` (which reading set
+to print, overriding the compiled default) and `-h`/`--help`; everything else is
+compile-time. Reading text wraps to the terminal width by default (see `WRAP`);
+piped output is left one line per verse.
+
 ## Configure (suckless style)
 
 Edit `config.h` (copied from `config.def.h` on first build), then `make`:
@@ -27,7 +34,8 @@ Edit `config.h` (copied from `config.def.h` on first build), then `make`:
   * `FORM_OF` / `FORM_EF`         — Ordinary Form (1969) or Extraordinary Form (1962)
   * `SIGLA_ENGLISH` / `SIGLA_LATIN` — citation dialect (`Jer 14` vs `Ier 14`)
   * `COLOR`                       — colour the day name with its liturgical colour
-  * `GOSPEL_ONLY`                 — print every reading (0, default) or just the Gospel (1)
+  * `GOSPEL_ONLY`                 — default reading set: every reading (0) or the Gospel only (1); override per run with `-a` / `-g`
+  * `WRAP`                        — wrap reading text at N columns; `0` fits the terminal (and leaves piped output unwrapped)
 
 One form per binary; for both, build twice. The interface is English only.