chore: reorganize examples and templates into examples/ by type (#54)

- Move example skills to examples/skills/
- Move scaffolding templates to examples/{agents,hands,channels,plugins,providers,integrations,skills}/
- Remove legacy skill.toml from example skills; SKILL.md is the canonical format
- Delete top-level templates/ directory

skills/custom-skill-prompt/skill.toml

@@ -1,24 +0,0 @@
-## Custom Prompt Skill Example
-##
-## The prompt body and metadata (name, description) live in SKILL.md.
-## This skill.toml only declares the runtime, input schema, and optional
-## metadata that don't fit in Markdown frontmatter.
-##
-## To test: librefang skill test ./skills/custom-skill-prompt \
-##   --input '{"topic": "Q1 planning", "duration_minutes": "30"}'
-##
-## For the full reference, see: docs/skill-development.md
-
-[skill]
-name = "meeting-agenda"
-version = "0.1.0"
-description = "Generate a structured meeting agenda from a topic and duration."
-author = "your-name"
-tags = ["meeting", "productivity", "example"]
-
-[runtime]
-type = "promptonly"
-
-[input]
-topic = { type = "string", description = "The meeting topic", required = true }
-duration_minutes = { type = "string", description = "Meeting duration in minutes", required = true }

skills/custom-skill-python/skill.toml

@@ -1,20 +0,0 @@
-## Custom Python Skill Example
-##
-## This skill counts words in a given text and returns basic statistics.
-## To test: librefang skill test ./examples/custom-skill-python --input '{"text": "Hello world"}'
-##
-## For the full reference, see: docs/skill-development.md
-
-[skill]
-name = "word-counter"
-version = "0.1.0"
-description = "Count words, sentences, and characters in text."
-author = "your-name"
-tags = ["text", "utility", "example"]
-
-[runtime]
-type = "python"
-entry = "main.py"
-
-[input]
-text = { type = "string", description = "The text to analyze", required = true }