Add reusable SEO code snippet library with 7 tested examples

All snippets verified against the current API (v5.16.3) for use
across blog posts, notebooks, README, and documentation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: dgunning

docs/examples/snippets.md

@@ -0,0 +1,96 @@
+# EdgarTools SEO Code Snippets
+
+Reusable, tested code snippets for use across blog posts, notebooks, README, and documentation.
+Each snippet is self-contained, produces meaningful output, and works with edgartools 5.16+.
+
+**Core message**: Free, no API key, 3 lines of Python.
+
+---
+
+## 1. Get a Company's Financial Statements
+
+```python
+from edgar import Company
+
+tenk = Company("AAPL").get_filings(form="10-K")[0].obj()
+print(tenk.financials.income_statement())
+```
+
+---
+
+## 2. Search and Browse Filings
+
+```python
+from edgar import Company
+
+filings = Company("MSFT").get_filings(form="10-K")
+filing = filings[0]
+filing.open()  # Opens in browser
+```
+
+---
+
+## 3. Get Insider Trading Data
+
+```python
+from edgar import Company
+
+form4s = Company("TSLA").get_filings(form="4").head(5)
+for f in form4s:
+    print(f.obj())
+```
+
+---
+
+## 4. Track Hedge Fund Holdings (13F)
+
+```python
+from edgar import Company
+
+thirteenf = Company(1423053).get_filings(form="13F-HR")[0].obj()  # Citadel Advisors
+print(thirteenf.holdings)
+```
+
+---
+
+## 5. Get Today's SEC Filings
+
+```python
+from edgar import get_current_filings
+
+filings = get_current_filings().filter(form="8-K")
+print(filings)
+```
+
+---
+
+## 6. Get Revenue Across Years
+
+```python
+from edgar import Company
+
+facts = Company("GOOG").get_facts()
+print(facts.get_revenue())
+```
+
+---
+
+## 7. Comparison: edgartools vs sec-api
+
+```python
+# edgartools — free, no API key, 3 lines
+from edgar import Company
+
+income = Company("AAPL").get_filings(form="10-K")[0].obj().financials.income_statement()
+print(income)
+
+# sec-api — $55-$239/month, API key required, 15+ lines
+# from sec_api import QueryApi, XbrlApi
+# api = QueryApi(api_key="YOUR_PAID_API_KEY")
+# query = {"query": {"query_string": {"query": 'ticker:AAPL AND formType:"10-K"'}}}
+# filings = api.get_filings(query)
+# xbrl_api = XbrlApi(api_key="YOUR_PAID_API_KEY")
+# xbrl_json = xbrl_api.xbrl_to_json(accession_no=filings[0]["accessionNo"])
+# income = xbrl_json["StatementsOfIncome"]
+# ... more parsing needed ...
+```