docs: align wiki to the Karafka writing style
Style-only pass across 39 pages: reduce decorative bold to scannable labels and
callouts, Title Case headings, expand contractions, present tense, US English,
cut filler and --- separators, tag code fences. Commands, code, config,
COI_* env vars, paths, URLs, wiki links/anchors, and tables left unchanged.
docs: point URLs at mensfeld/coi + fix leftover code-on-incus branding
Repo renamed mensfeld/code-on-incus -> mensfeld/coi: update all wiki links
(install.sh raw URL, issues/releases/tree/wiki links) and one leftover
"code-on-incus" prose ref -> Coi.
docs: rebrand to Coi (drop all-caps COI; Coi primary, coi command)
COI -> Coi across all pages; sidebar + Home first-mention use "Coi (Code on Incus)".
Preserved: COI_* env-var names and the literal "# COI Sandbox ..." context markers
(they document the actual on-disk marker text). Lowercase coi commands unchanged.
docs: cover 0.12.0 capabilities (coi tool spec, coi top, omp, SANDBOX_CONTEXT.json)
Bring the wiki up to date with capabilities added since the last update:
- New page **Headless Orchestration (`coi tool spec`)** — the non-executing
launch-spec API for external orchestrators, incl. --continue / --resume-id /
--resume, the `prompt` field for non-embedding tools, and env/secrets model.
- New page **Resource Usage (`coi top`)** — live per-container/per-process CPU,
memory, disk and network usage; flags, examples, and how it reads cgroups.
- **Supported Tools**: add the omp (Oh My Pi) tool section; document the
~/SANDBOX_CONTEXT.json companion (context_json / context_json_file, trusted
scope only).
- **Configuration**: add context_json / context_json_file to the [tool] reference.
- Wire both new pages into Home + _Sidebar; cross-link Tmux Automation ->
Headless Orchestration.
(codex, tmpfs_size, per-host/per-destination ports, dns_servers, allowed_ports,
and git readonly were already documented.)