feat: init wizard v2 improvements

[aorumbayev]

Addresses -> https://github.com/orgs/algorandfoundation/projects/1?pane=issue&itemId=53079977

Proposed Changes

• Refining presets, adding notion of a custom preset
• Reusing algokit-base-template for workspace specific artifacts - to remove coupling and redundancy
• Renaming templates_generated to more generic examples folder that by default tests the main 'starter' and 'production' presets
• Adding Contribution guide and simple starting point for generating dummy instances of templates for quick preview during development
• Refining codespaces setup for vscode for puya, beaker. Tealscript is currently not supporting the full e2e launch config flow hence template will only supply base codespaces file for aggregate folder preview (no custom launch configs).
• Fixing visitors badge
• Base template at the workspace level (see step 1 in _tasks in copier.yaml at the root) - also drops a devcontainer artifact for github codespaces (similar behaviour for all standalone templates too). Making it easy to quickly load up any workspace typed algokit project to a dev environment from their github repo. A feature heavily utilized by DevRels during various bootcamp activities, given existing feedback and feature requests as part of the wizard adr and small footprint i think its a fair point to keep devcontainers at the base template level.
• TEMPORARY - changing pipx install algokit to version from wizard v2 branch

[neilcampbell]

Do we want to use a non pre release min version?