feat(addons): add the Short memory add-on

The add-on declares the three index files of the person's notes
(capabilities.contextFiles, manifest API 2), so the host loads them into
the prompt and serves their topics with context_read. It ships two skills:
memory, whose description asks the model to read the matching topic before
it answers almost anything and to save a note only as a proposal the person
confirms, and memory-check-own-files, which says what the model can and
cannot read. Its executable serves no tool, and its page explains the notes
and opens the Memory tab of the account.

The add-on joins the packaging matrix, the release workflow, the library
index and the case inventory. The declared capabilities the host hands to
an add-on now include the context files.

Assisted-by: Claude:claude-sonnet-5-5
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

.github/workflows/addons-package.yml

@@ -107,7 +107,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        addon: [tables, voice, face, fine-tuning, quantization, studio, talk, telegram, slack, office, sandbox, web]
+        addon: [tables, voice, face, fine-tuning, quantization, studio, talk, telegram, slack, office, sandbox, web, memory]
     steps:
       - uses: actions/checkout@v7
         with:
@@ -226,7 +226,7 @@ jobs:
           # event it fails the plan. A missing or malformed platform file, or
           # any other error, fails the plan on every event.
           include='[]'
-          for id in tables voice face fine-tuning quantization studio talk telegram slack office sandbox web; do
+          for id in tables voice face fine-tuning quantization studio talk telegram slack office sandbox web memory; do
             cfg="addons/$id/package/platforms.yaml"
             err="matrix-$id.err"
             if rows=$(go run ./scripts/addons/cmd/addonpkg matrix --config "$cfg" 2>"$err"); then