fix(github-binary): clean up cargo and apt versions before installing

Problem: Tools installed via cargo or apt conflict with GitHub binaries
- ripgrep 14.1.1 (cargo) at ~/.cargo/bin/rg
- ripgrep 14.1.0 (apt) at /usr/bin/rg
- Both block newer GitHub binary at ~/.local/bin/rg

Solution: Automatically clean up alternative installations before installing

Changes:
- Remove cargo-installed binaries from ~/.cargo/bin before installing
- Detect and remove apt-installed versions (requires sudo)
- Ensures GitHub binary takes precedence in PATH

This fixes cases where:
- `make upgrade` installs new version but old version still executes
- Multiple tool versions exist in different PATH locations
- Users see "before: X, after: X" (no update) despite successful install

Note: apt removal requires sudo and may fail silently if user doesn't
have passwordless sudo. In that case, manual removal required:
  sudo apt remove <package-name>

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: AI Assistant

scripts/installers/github_release_binary.sh

@@ -93,6 +93,20 @@ if ! [ -s "$tmpfile" ]; then
   exit 1
 fi
 
+# Clean up alternative installations (cargo, apt, brew) before installing
+if [ -f "$HOME/.cargo/bin/$BINARY_NAME" ]; then
+  echo "[$TOOL] Removing cargo-installed version at ~/.cargo/bin/$BINARY_NAME" >&2
+  rm -f "$HOME/.cargo/bin/$BINARY_NAME"
+fi
+
+# Check if apt-installed and suggest removal
+if command -v dpkg >/dev/null 2>&1 && dpkg -S "/usr/bin/$BINARY_NAME" >/dev/null 2>&1; then
+  PKG="$(dpkg -S "/usr/bin/$BINARY_NAME" | cut -d: -f1)"
+  echo "[$TOOL] Note: apt-installed version found in package '$PKG'" >&2
+  echo "[$TOOL] Removing apt package to prevent conflicts..." >&2
+  apt_remove_if_present "$PKG" || true
+fi
+
 # Install
 chmod +x "$tmpfile"
 $INSTALL -T "$tmpfile" "$BIN_DIR/$BINARY_NAME"