Added source for Sheffield City Council

Added source for Sheffield City Council with support for all bin types.
I never got Dev Containers working to properly test, however I have manually added this as a source to my instance of Home Assistant/HACS and tested fine.

custom_components/waste_collection_schedule/waste_collection_schedule/source/sheffield_gov_uk.py

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+import urllib.request
+from bs4 import BeautifulSoup
+from dateutil import parser
+import logging
+from waste_collection_schedule import Collection
+
+TITLE = "Sheffield.gov.uk"
+
+DESCRIPTION = (
+    "Source for waste collection services from Sheffield City Council (SCC)"
+)
+
+# Base URL for waste collection services
+URL = "https://wasteservices.sheffield.gov.uk/"
+
+# Headers to mimic the browser
+HEADERS = {
+    "user-agent": "Mozilla/5.0",
+}
+
+TEST_CASES = {
+    # These are random addresses around Sheffield
+    # If your property is listed here and you don't want it, please raise an issue and I'll amend
+    "test001" : {"uprn": "100050938234"},
+    "test002" : {"uprn": "100050961380"},
+    "test003" : {"uprn": "100050920796"},
+}
+
+# Icons for the different bin types
+ICONS = {
+    "BLACK": "mdi:delete-empty", # General Waste
+    "BROWN": "mdi:glass-fragile", # Glass, Tins, Cans & Plastics
+    "BLUE": "mdi:newspaper", # Paper & Cardboard
+    "GREEN": "mdi:leaf", # Garden Waste
+}
+
+_LOGGER = logging.getLogger(__name__)
+
+class Source:
+    def __init__(self, uprn=None):
+        self._uprn = str(uprn)
+
+    def fetch(self):
+        if self._uprn:
+            # Get the page containing bin details
+            # /calendar gives further future informaion over just the "Services" page
+            req = urllib.request.Request(f"{URL}/property/{self._uprn}/calendar",headers=HEADERS)
+            with urllib.request.urlopen(req) as response:
+                html_doc = response.read()
+
+            # Parse the page to get the data required (collection date and type)
+            soup = BeautifulSoup(html_doc, 'html.parser')
+            entries = []
+            # Find all entries relating to bin collection & loop through them
+            for collection in soup.find_all('div',{"class":"calendar-table-cell"}):
+                try:
+                    # The collection details are in the title field of each ul/li
+                    # Converting date from title field to a usable format
+                    collection_date = parser.parse(collection.ul.li['title'].split(" - ")[0]).date()
+                    # Getting the collection type
+                    collection_type = collection.ul.li['title'].split(" - ")[1]
+
+                    # Append to entries for main program
+                    entries.append(
+                        Collection(
+                            date = collection_date,
+                            t = collection_type,
+                            icon = ICONS.get(collection_type.replace(" Bin","").upper()),
+                        )
+                    )
+                except ValueError:
+                    pass
+
+        return entries

doc/source/sheffield_gov_uk.md

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+# Sheffield City Council
+
+Support for schedules provided by [Sheffield City Council](https://wasteservices.sheffield.gov.uk/).
+
+## Configuration via configuration.yaml
+
+```yaml
+waste_collection_schedule:
+    sources:
+    - name: sheffield_gov_uk
+      args:
+        uprn: UNIQUE_PROPERTY_REFERENCE_NUMBER
+```
+
+### Configuration Variables
+
+**uprn**<br>
+*(string) (optional) (preferred method)*
+
+This is required if you do not supply any other options. Using a UPRN removes the need to do an address look up using web requests.
+
+## Example using UPRN
+```yaml
+waste_collection_schedule:
+    sources:
+    - name: sheffield_gov_uk
+      args:
+        uprn: "100050938234"
+```
+
+## How to find your `UPRN`
+
+An easy way to find your Unique Property Reference Number (UPRN) is by going to https://www.findmyaddress.co.uk/ and entering in your address details.
+
+Otherwise you can inspect the URL on [Sheffield City Council's Waste Services](https://wasteservices.sheffield.gov.uk/) site having searched for and selected your address details. Your UPRN is the collection of digits at the end of the URL (before /calendar), for example: *https://wasteservices.sheffield.gov.uk/property/`100050938234`* or *https://wasteservices.sheffield.gov.uk/property/`100050938234`/calendar*