Name it Gyre - Sand Art Table

README, build guide, software README, web page header and title, jog page,
desktop alerts and the start-up message now say Gyre. The repo, the Python
package and its commands keep their names (sandTable, python3 -m sandtable),
so links and setups keep working. New web page screenshot.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

software/sandtable/ui.py

@@ -13,7 +13,7 @@ from .grbl import RT_HOLD, RT_JOG_CANCEL, GrblError
 
 PAGE = r"""<!doctype html>
 <html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1">
-<title>Sand Table Jog</title>
+<title>Gyre - Jog</title>
 <style>
 :root{--bg:#f6f4ef;--card:#fff;--ink:#222;--mute:#666;--line:#ddd;--acc:#2f6f5e;--stop:#c0392b}
 @media (prefers-color-scheme:dark){:root{--bg:#1b1c1e;--card:#26282b;--ink:#eee;--mute:#aaa;--line:#3a3d41;--acc:#5fb49c}}
@@ -36,7 +36,7 @@ input{font:inherit;width:90px;padding:8px;border-radius:6px;border:1px solid var
 .err{color:var(--stop)}
 small{color:var(--mute)}
 </style></head><body><main>
-<h1>Sand table: jog &amp; calibrate</h1>
+<h1>Gyre: jog &amp; calibrate</h1>
 <div class="card"><div class="stat">
  <div><span>State</span><b id="state">-</b></div>
  <div><span>Rho (mm)</span><b id="rho">-</b></div>