Add cross-platform packaging, icons, and Claude Code config discovery

- Auto-discovers Claude Code (~/.claude/settings.json) alongside Claude Desktop
- Generated icons/app.icns (macOS) and icons/app.ico (Windows) from rounded PNGs
- bcc.spec: PyInstaller spec for all platforms (.app on macOS, onefile on Windows/Linux)
- .github/workflows/release.yml: builds and publishes GitHub Release on version tags
- scripts/build_icons.py: regenerates icon files from source PNGs
- requirements-dev.txt: adds pyinstaller and pillow for building
- CLAUDE.md: initial repo guidance for Claude Code

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bcc.spec

@@ -0,0 +1,111 @@
+# -*- mode: python ; coding: utf-8 -*-
+#
+# PyInstaller spec for Better Claude Config.
+#
+# macOS  → onedir build wrapped in a .app bundle (double-click native)
+# Windows → onefile .exe  (no console window)
+# Linux  → onefile binary (no console window)
+#
+# Build:
+#   pip install pyinstaller
+#   pyinstaller bcc.spec
+#
+# Output:
+#   macOS   → dist/BetterClaudeConfig.app
+#   Windows → dist/BetterClaudeConfig.exe
+#   Linux   → dist/BetterClaudeConfig
+
+import sys
+
+APP_NAME = "BetterClaudeConfig"
+BUNDLE_ID = "com.betterclaude.config"
+
+if sys.platform == "darwin":
+    icon = "icons/app.icns"
+elif sys.platform == "win32":
+    icon = "icons/app.ico"
+else:
+    icon = None  # Linux: icon embedded via .desktop file, not the binary
+
+a = Analysis(
+    ["bcc.py"],
+    pathex=[],
+    binaries=[],
+    datas=[],
+    hiddenimports=[],
+    hookspath=[],
+    hooksconfig={},
+    runtime_hooks=[],
+    excludes=["_tkinter", "tkinter"],
+    noarchive=False,
+)
+pyz = PYZ(a.pure)
+
+if sys.platform == "darwin":
+    # ------------------------------------------------------------------ macOS
+    # onedir so PyInstaller produces a proper .app bundle structure.
+    exe = EXE(
+        pyz,
+        a.scripts,
+        [],
+        exclude_binaries=True,
+        name=APP_NAME,
+        debug=False,
+        bootloader_ignore_signals=False,
+        strip=False,
+        upx=False,
+        console=False,
+        argv_emulation=True,  # lets macOS open files by passing argv
+        target_arch=None,
+        codesign_identity=None,
+        entitlements_file=None,
+        icon=icon,
+    )
+    coll = COLLECT(
+        exe,
+        a.binaries,
+        a.datas,
+        strip=False,
+        upx=False,
+        upx_exclude=[],
+        name=APP_NAME,
+    )
+    app = BUNDLE(
+        coll,
+        name=f"{APP_NAME}.app",
+        icon=icon,
+        bundle_identifier=BUNDLE_ID,
+        info_plist={
+            "CFBundleName": "Better Claude Config",
+            "CFBundleDisplayName": "Better Claude Config",
+            "CFBundleShortVersionString": "1.0.0",
+            "CFBundleVersion": "1.0.0",
+            "NSHighResolutionCapable": True,
+            "NSRequiresAquaSystemAppearance": False,  # supports dark mode
+            "LSMinimumSystemVersion": "11.0",
+        },
+    )
+
+else:
+    # ----------------------------------------------- Windows / Linux (onefile)
+    exe = EXE(
+        pyz,
+        a.scripts,
+        a.binaries,
+        a.datas,
+        [],
+        name=APP_NAME,
+        debug=False,
+        bootloader_ignore_signals=False,
+        strip=False,
+        upx=True,
+        upx_exclude=[],
+        runtime_tmpdir=None,
+        console=False,
+        disable_windowed_traceback=False,
+        argv_emulation=False,
+        target_arch=None,
+        codesign_identity=None,
+        entitlements_file=None,
+        icon=icon,
+    )