Update to support reflex >0.8.0

[TimChild]

This PR updates the project to support reflex >0.8.0 with necessary compatibility changes:

• Updated pyproject.toml to require reflex >0.8.0
• Updated demo and test files for compatibility
• Updated lock file with new dependencies
• Made necessary code adjustments for new reflex version

This builds on the recently merged PR #16 that fixed the EventLoop import issues.

[Copilot]

Pull Request Overview

This PR updates the project to support reflex version 0.8.0 and above, making necessary compatibility adjustments across dependency declarations, routing conventions, test selectors, and build tooling.

Key changes:

• Updated reflex dependency from >=0.7.5 (previously pinned at ==0.7.5) to >=0.8.0
• Migrated catch-all route parameters from custom names to the standardized [[...splat]] convention
• Updated test selectors from ID-based to semantic role-based queries for better resilience

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pyproject.toml	Updated reflex dependency constraint to >=0.8.0 and added new dev dependencies (uvicorn, psutil)
uv.lock	Updated lock file with new dependency versions including reflex 0.8.20, granian 2.6.0, click 8.3.1, starlette 0.50.0, and removed obsolete dependencies (fastapi, gunicorn, distro, etc.)
custom_components/reflex_clerk_api/pages.py	Changed catch-all route parameters from [[...signin]] and [[...signup]] to [[...splat]] to align with reflex 0.8.x conventions
custom_components/reflex_clerk_api/init.py	Bumped package version from 1.0.2 to 1.1.0
tests/test_demo.py	Updated test selectors from ID-based locators to semantic role-based selectors and removed assertion for "Demos" text
clerk_api_demo/clerk_api_demo/clerk_api_demo.py	Updated documentation string from "supports reflex 0.7.x" to "supports reflex 0.8.x"
Taskfile.yml	Changed version bump commands from uv run hatch to uvx hatch for cleaner tool invocation

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