Add deployment badges

[MUFFANUJ]

closes #287

Adds Try it out: deployment badges ( jupyterlite and binder - lab)to each individual example section in README.md:

[MUFFANUJ]

Currently, we’ve included only the Lab links. Adding Notebook links would mean introducing two more links, which may be unnecessary.

[krassowski]

I think we can add links for Notebook for the three extensions which are used to demonstrate dual compatibility:

[krassowski]

Should we be adding them in individual per-example README files too? e.g. commands/README.md?

[MUFFANUJ]

I think we can add links for Notebook for the three extensions which are used to demonstrate dual compatibility:

Sure

[MUFFANUJ]

The tests failure doesnt seem relevant to our changes, @krassowski please take a look :)

[krassowski]

Thank you! I will also ask copilot for a pass

[Copilot]

Pull request overview

Adds “Try it out” deployment badges to make each example runnable directly via the JupyterLab plugin-playground (JupyterLite and/or Binder), improving discoverability and lowering the barrier to experimentation without local setup.

Changes:

• Added JupyterLite + Binder “Try it out” links to the top-level README.md for each example section (including dual-compatibility examples with Lab/Notebook v7 variants).
• Added corresponding “Try it out” links to individual example README.md files.
• Minor formatting update to documents/src/factory.ts, with synced embedme line references in documents/README.md.

Reviewed changes

Copilot reviewed 31 out of 31 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
README.md	Adds per-example “Try it out” badges (JupyterLite/Binder) across the main examples index, including dual-compatibility tables and Binder-only server example note.
cell-toolbar/README.md	Adds “Try it out” badges for the cell-toolbar example.
clap-button-message/README.md	Adds “Try it out” table (Lab + Notebook v7) with JupyterLite/Binder links.
codemirror-extension/README.md	Adds “Try it out” badges for the CodeMirror extension example.
command-palette/README.md	Adds “Try it out” badges for the command palette example.
commands/README.md	Adds “Try it out” badges for the commands example.
completer/README.md	Adds “Try it out” badges for the completer example.
contentheader/README.md	Adds “Try it out” badges for the content header example.
context-menu/README.md	Adds “Try it out” badges for the context menu example.
custom-log-console/README.md	Adds “Try it out” badges for the custom log console example.
datagrid/README.md	Adds “Try it out” badges for the datagrid example.
documents/src/factory.ts	Reformats ExampleDocModelFactory declaration (single-line implements), aligning with existing formatting tooling expectations.
documents/README.md	Adds “Try it out” badges and updates embedded snippet line references to match the source formatting change.
hello-world/README.md	Adds “Try it out” badges for the hello-world example.
kernel-messaging/README.md	Adds “Try it out” badges for the kernel-messaging example.
kernel-output/README.md	Adds “Try it out” badges for the kernel-output example.
launcher/README.md	Adds “Try it out” badges for the launcher example.
log-messages/README.md	Adds “Try it out” badges for the log-messages example.
main-menu/README.md	Adds “Try it out” badges for the main-menu example.
metadata-form/README.md	Adds “Try it out” badges for the metadata-form example.
mimerenderer/README.md	Adds “Try it out” badges for the mimerenderer example.
notifications/README.md	Adds “Try it out” badges for the notifications example.
react-widget/README.md	Adds “Try it out” badges for the react-widget example.
server-extension/README.md	Adds Binder “Try it out” link and clarifies JupyterLite is unsupported by design.
settings/README.md	Adds “Try it out” badges for the settings example.
shout-button-message/README.md	Adds “Try it out” table (Lab + Notebook v7) with JupyterLite/Binder links.
signals/README.md	Adds “Try it out” badges for the signals example.
state/README.md	Adds “Try it out” badges for the state example.
toolbar-button/README.md	Adds “Try it out” badges for the toolbar-button example.
toparea-text-widget/README.md	Adds “Try it out” table (Lab + Notebook v7) with JupyterLite/Binder links.
widgets/README.md	Adds “Try it out” badges for the widgets example.

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