New module build_schema

[Daniel-VM]

PR Description

This pull request introduces a new module, build_schema.py, designed to parse a database definition in XLSX format and convert it into two files simultaneously: relecov schema definition (relecov_tools/schema/relecov_schema.json) and Metadata-Lab Template (XLSX file template for entering lab metadata).

Additionally, this module will generate and save a report that compares the updated version of relecov_schema.json with its previous version after each execution of the module, while also tracking versioning.

Major features and Implementations::

1. Schema Draft Template Creation: Loads a JSON schema draft template based on the specified version.
2. Base schema retrieval: get the in-use schema (relecov_tools/schema/relecov_schema.json).
3. Building a New Schema: Constructs a new json schema based on the database definitions and the draft skeleton. It is able to handle various schema properties.
4. Validation of the new schema: Ensures that the new schema follows JSON schema definition based on version draft.
5. Create new Schema and prints diff: Compares and prints differences between the base schema and the new schema. If allowed, this method will generate the new JSON Schema.
6. Handling schema building process: Orchestrates the schema building process.

Utility functions

1. Creates JSON schema draft/template version.
2. Checks if JSON schema draft version is available.
3. Validates whether the JSON schema follows the JSON meta-schema specification rules (according to the selected version).

Closes #259