ToolEntry (or builder) values add or replace tools in defaults.
false values remove tools from defaults.
It returns a new object and never mutates defaults.
Default entries may be builders that produce
their ToolEntry from build-time options. Builders pass through
untouched, and setupTools materializes them later.
Merges default tools with user overrides.
ToolEntry(or builder) values add or replace tools indefaults.falsevalues remove tools fromdefaults.defaults.Default entries may be builders that produce their ToolEntry from build-time options. Builders pass through untouched, and
setupToolsmaterializes them later.