Reflect the removal of PlanBackend/MemoryBackend abstractions and the
addition of pkg/tools/memory and pkg/tools/task. Update tool table (12
tools, 5 servers), data flow diagram, planning lifecycle, and consumer
setup example. Rewrite PLANNING.md around task_plan/task_complete.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
help.md: s/new was listed as (w) but reading returns a KV template.
9p submodule: ctl comment listed 'compact, clear, interrupt' but
actual commands are stop, kill, rn, compact, clear.
Completes the rename started with the 9P file change.
Go API: WorkDir→CWD, SetWorkDir→SetCWD, WorkDirSetter→CWDSetter.
Unexported: workdir→cwd in fields, params, locals.
Template: {{.WorkDir}}→{{.CWD}}.
Docs: ARCHITECTURE.md, PLANNING.md, README.md, IDEAS.md.
- 9p: add Tcreate for /t and /sk, writable skill files, tools path
- core: default tools path to ~/.config/ollie/tools
- docs: update ARCHITECTURE.md and IDEAS.md for new path