Humanize READMEs and guides for clearer, professional tone

Align with project-template docs/writing-docs.md: plain openings, no
emoji decoration, archive scratch plans where they cluttered live docs.

docs/FREE_TESTING_QUICKSTART.md

@@ -2,14 +2,14 @@
 
 ## TL;DR: You can test everything for $0
 
-### Already Working (PR1 ✅)
+### Already Working (PR1 )
 - **Price data**: `yfinance` (free, unlimited)
 - **Unit tests**: Mocked data in `tests/` (15 passing tests)
 - **Coverage**: 87% without any paid APIs
 
 ### For PR2 (Congressional Trades) - FREE Options
 
-#### Best Option: House Stock Watcher 🌟
+#### Best Option: House Stock Watcher
 ```bash
 # No API key needed, just scrape their public JSON
 curl https://housestockwatcher.com/api/all_transactions
@@ -44,10 +44,10 @@ python scripts/fetch_house_watcher_sample.py  # We'll build this in PR2
 
 ### What You DON'T Need to Pay For
 
-❌ QuiverQuant Pro ($30/mo) - free tier is enough for dev/testing  
-❌ Financial Modeling Prep paid tier - free tier works  
-❌ Any paid database hosting - SQLite works great locally  
-❌ Any cloud services - runs 100% locally
+ QuiverQuant Pro ($30/mo) - free tier is enough for dev/testing 
+ Financial Modeling Prep paid tier - free tier works 
+ Any paid database hosting - SQLite works great locally 
+ Any cloud services - runs 100% locally
 
 ### When You MIGHT Want Paid (Way Later)
 
@@ -56,7 +56,7 @@ python scripts/fetch_house_watcher_sample.py  # We'll build this in PR2
 - Multiple concurrent users on a dashboard
 - Commercial use (check each API's terms)
 
-**For personal research? Stay free forever. 🎉**
+**For personal research? Stay free forever. **
 
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