fix(skills): label local skills correctly in skills list

[0xNyk]

Summary: fix skills list source classification so non-hub skills are no longer all labeled builtin.

Now distinguishes:

hub: from hub lockfile
builtin: present in bundled manifest (tools.skills_sync._read_manifest)
local: remaining skills under user skills dir
Also adds source filter local in CLI parser/help.

Tests added:

builtin vs hub vs local classification
source_filter=local behavior
Validation:
python -m pytest -o addopts=\ tests/hermes_cli/test_skills_hub.py tests/hermes_cli/test_skills_subparser.py tests/test_cli_init.py -q

Closes #861

[teknium1]

Closing this as redundant.

The behavior from this PR is already on current main:

• hermes skills list --source local already exists in hermes_cli/main.py
• hermes_cli/skills_hub.py already distinguishes hub, builtin, and local
• tests/hermes_cli/test_skills_hub.py already covers the three-way classification and source filters

Relevant current-main commits/blame points I checked:

• d94519c5 added the local source classification/filter behavior
• bb7cdc6d4 added the corresponding test_skills_hub.py coverage

Because the code and tests are already present, trying to merge this branch now just conflicts with current main without adding new behavior. Thanks for the patch and for writing it up clearly.