fix: sync __version__ with pyproject.toml (1.0.0 → 1.2.0)

Fixes #29 — __version__ in __init__.py was still '1.0.0' while pyproject.toml
had already been bumped to '1.2.0'. This caused misleading output in
'agent-reach --version' and 'agent-reach doctor'.

agent_reach/__init__.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 """Agent Reach — Give your AI Agent eyes to see the entire internet."""
 
-__version__ = "1.0.0"
+__version__ = "1.2.0"
 __author__ = "Neo Reid"
 
 from agent_reach.core import AgentReach