docs(agent): streamline skill compatibility and add operations guide

ci(release): reduce docker release build time with single-arch and gha cache

feat(agent): lock default enrollment CIDR and remove language-switch code paths

docs(readme): rename project header to GitClaw

docs(readme): remove upstream backers/sponsors and FAQ sections

docs(readme): simplify docs wording and remove translating/communication sections

docs(readme): replace upstream badges with GitClaw-maintained badges

chore(i18n): remove non-English locale assets and translated readmes

feat(i18n): enforce English-only UI and remove language switching

docs(readme): describe GitClaw hard-fork rationale and agent-first features

ci(release): publish docker image to ghcr on release

chore(ci): remove upstream cron and release workflows for hardfork

fix(agent-enrollment): remove external internal-token auth and harden public flow

Merge branch 'agent-enrollment-v1'

feat(agent-enrollment): add secure agent signup, token rotation, and deployment docs