Refactor and modularise

[mrfelton]

Refactoring to consolidate organic growth of the codebase into a more concise implementation that will be easier to maintain moving forwards.

This pull request introduces multiple changes to the codebase to improve the functionality and structure of the project. The most important changes include the addition of a data provider manager, the implementation of a logger, the creation of utility functions, and the restructuring of the project's components.

Here are the top five most important changes:

1. Addition of a Data Provider Manager:
   A new class DataProviderManager was added in src/lib/DataProviderManager.ts. This class manages data providers, allowing the registration of new providers and fetching data from the cache or providers. It also includes methods to fetch and sort data points, merge fee estimates, and more.

2. Implementation of a Logger:
   A new logger was implemented in src/lib/logger.ts. This logger creates a new logger with a specified log level using the pino library. It also handles the creation of a logger with pretty-printing enabled, if possible.

3. Creation of Utility Functions:
   Several utility functions were added in src/lib/util.ts, such as fetchWithTimeout and fetchData. These functions help fetch resources from URLs with a timeout and fetch data from specific URLs with a specified response type and timeout, respectively.

4. Restructuring of Components:
   The project's components were restructured, with new components added and existing components modified. Some of the significant changes include:

   • src/components/Content.tsx: A new Content component was added, which includes the site layout and data presentation.
   • src/components/Layout.tsx: A new Layout component was added, which includes the HTML structure of the site.
   • src/components/index.ts: The index file was updated to export the new Content and Layout components.

5. Addition of Providers:
   New providers were added to fetch data from different sources.

   • src/providers/bitcoind.ts: A new BitcoindProvider class was added to fetch data from a Bitcoind server.
   • src/providers/esplora.ts: A new EsploraProvider class was added to fetch data from an Esplora server.

Finally, the prettier package was added to the package.json file [1] and the src/logger.ts file was removed [2].