muvuula/deepseek-harness-core (mcore.fit): Add a self-fitting local kernel layer to DSH

This article introduces the DSH plugin muvuula/deepseek-harness-core (named mcore.fit in the repository, package name @muvuula/mcore, formerly known as DHC). It implements a persistent kernel featuring personality modules (heart/emotion/brain/soul), three-tier memory and archival, automatic context compression, and timeline deduction. All data remains on the local machine, and personality data is migrated solely via the soul export/import channel. Pet rendering is offloaded to the independent dsh-pet plugin, while the "two layers" operate strictly over HTTP. The article provides three installation paths (tarball / GitHub tag / local directory), prerequisites, a curl self-check interface, and a typical usage sequence. It also notes the tags labeled "Memory" and starred 2, the version discrepancy between README v0.72.1 and package.json 0.74.0, and the conflict between the MIT license and the "private source code, non-redistributable" description, advising users to verify these details before installation.