Doc: Use real-life workshop examples

[akcano]

No description provided.

[Copilot]

Pull request overview

Updates Workshop documentation to replace fictional SDK/interface examples with a more realistic “notebook” workshop scenario, aligning reference and conceptual docs with the newer SDK ecosystem and interfaces usage.

Changes:

• Replaced the older tensorflow/imagenet/cuda example with an ollama/uv/jupyter-based workshop example, including updated narrative and literalinclude.
• Clarified mount interface semantics around directory creation/existence for plugs vs slots.
• Added a new workshop-notebook.yaml example and removed the deprecated workshop-digits-cuda.yaml, plus updated the docs custom wordlist accordingly.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
docs/reference/definition-files/workshop-definition.rst	Switches the referenced workshop example to the new notebook scenario and updates explanatory text.
docs/reference/definition-files/_interfaces/mount.rst	Adds clarifications about mount target/source directory behavior (creation vs preexistence).
docs/explanation/workshops/concepts.rst	Updates the conceptual grafting/connections example to use the new SDKs and tunnel connections.
docs/examples/workshop-notebook.yaml	Introduces the new real-life notebook workshop definition example.
docs/examples/workshop-digits-cuda.yaml	Removes the old fictional digits/cuda example.
docs/.custom_wordlist.txt	Removes an obsolete custom dictionary entry tied to the removed example.