Add schema validation for collection files #369

This commit improves collection file editing and error detection
directly in the IDE. It adds YAML schema, IDE configuration and
automatic tests to validate it.

- Introduce a YAML schema for collection file.
- Use `yaml-language-server` for enhanced YAML support in VSCode.
- Add telemetry disabling in `configure_vscode.py` to respect user
  privacy.
- Add automated checks to validate YAML file structure against the
  schema.
- Remove unused properties and do not allow them in compiler.

scripts/validate-collections-yaml/README.md

@@ -0,0 +1,51 @@
+# validate-collections-yaml
+
+This script validates YAML collection files against a predefined schema to ensure their integrity.
+
+## Prerequisites
+
+- Python 3.x installed on your system.
+
+## Running in a Virtual Environment (Recommended)
+
+Using a virtual environment isolates dependencies and prevents conflicts.
+
+1. **Create a virtual environment:**
+
+   ```bash
+   python3 -m venv ./scripts/validate-collections-yaml/.venv
+   ```
+
+2. **Activate the virtual environment:**
+
+   ```bash
+   source ./scripts/validate-collections-yaml/.venv/bin/activate
+   ```
+
+3. **Install dependencies:**
+
+   ```bash
+   python3 -m pip install -r ./scripts/validate-collections-yaml/requirements.txt
+   ```
+
+4. **Run the script:**
+
+   ```bash
+   python3 ./scripts/validate-collections-yaml
+   ```
+
+## Running Globally
+
+Running the script globally is less recommended due to potential dependency conflicts.
+
+1. **Install dependencies:**
+
+   ```bash
+   python3 -m pip install -r ./scripts/validate-collections-yaml/requirements.txt
+   ```
+
+2. **Run the script:**
+
+   ```bash
+   python3 ./scripts/validate-collections-yaml
+   ```