v0.10.1

Bug fix

package-boost:install was writing the literal four characters
${indent} to the start of the rewritten 'agents' => ..., line,
producing invalid PHP in workbench/config/package-boost.php:

${indent}'agents' => ['claude_code', 'copilot'],

The preg_replace replacement string used ${indent} as a named-
group backreference, but PHP only honours positional backreferences
($1, ${1}) in preg_replace replacements — named ones are
emitted verbatim. Switched to $1 against the (now-unnamed) first
capture group; existing comments, indentation, and unrelated config
keys still survive the rewrite.

Full Changelog: 0.10.0...0.10.1