Docs: update copilot-instructions and site for new launcher + Homebrew

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Gregg Cochran

.github/copilot-instructions.md

@@ -7,7 +7,7 @@ agent_pulse.py          — Main dashboard (single-file, Python/Textual/Rich)
 agent_pulse.tcss        — Textual CSS stylesheet (responsive layout)
 pyproject.toml          — Python packaging + console entry point
 requirements.txt        — Python deps (rich>=13.0.0, textual>=0.50.0)
-start.sh                — Launcher (auto-opens in a new terminal window)
+start.sh                — Launcher (auto-detects terminal emulator for new window; --here for in-place)
 quickstart.sh           — One-command installer
 site/index.html         — Showcase website (GitHub Pages)
 experimental/ink/       — React/Ink TUI (experimental, separate stack)

site/index.html

@@ -817,6 +817,10 @@ <h2 class="section-title glow-green">Up and Running in 30 Seconds</h2>
       </div>
       <div class="terminal-body">
         <div class="install-line"><span class="comment"># Clone the repository</span></div>
+        <div class="install-line"><span class="comment"># Install with Homebrew (macOS)</span></div>
+        <div class="install-line install-line-wrap"><span class="prompt">$ </span><span class="cmd">brew tap DUBSOpenHub/copilot-cli-agent-pulse &amp;&amp; brew install agent-pulse</span><button class="copy-btn" data-cmd="brew tap DUBSOpenHub/copilot-cli-agent-pulse && brew install agent-pulse">COPY</button></div>
+        <div class="install-line">&nbsp;</div>
+        <div class="install-line"><span class="comment"># — or — clone the repository</span></div>
         <div class="install-line install-line-wrap"><span class="prompt">$ </span><span class="cmd">git clone https://github.com/DUBSOpenHub/copilot-cli-agent-pulse.git</span><button class="copy-btn" data-cmd="git clone https://github.com/DUBSOpenHub/copilot-cli-agent-pulse.git">COPY</button></div>
         <div class="install-line">&nbsp;</div>
         <div class="install-line"><span class="comment"># Enter the directory</span></div>