chore: sync go.mod dependencies

Co-Authored-By: Virgil <[email protected]>

docs: add all .core/ config files to configuration reference

Added workspace.yaml, work.yaml, git.yaml, kb.yaml, test.yaml, and
manifest.yaml documentation. Added quick reference table with scope,
package, and discovery pattern for all 12 config file types. Expanded
directory structure to show user/workspace/project scopes.

Co-Authored-By: Virgil <[email protected]>

fix: update stale import paths and dependency versions from extraction

Resolve stale forge.lthn.ai/core/cli v0.1.0 references (tag never existed,
earliest is v0.0.1) and regenerate go.sum via workspace-aware go mod tidy.

Co-Authored-By: Virgil <[email protected]>

test(help): add full pipeline integration test

Verifies: content loading → catalog → static generation → file
structure → search index → HTML output with HLCRF layout.

Co-Authored-By: Virgil <[email protected]>