docs: Update API docs of public components (apify#914)

### Description

- Update API docs of public components.
- Add functions (context/crawler helpers) to a "Functions" API docs
section.

### Issues

- Closes: apify#304

### Testing

- The docs were rendered locally.

### Checklist

- [x] CI passed

docs/guides/code/storages/rq_with_crawler_example.py

@@ -5,7 +5,7 @@
 
 async def main() -> None:
     # Create a new crawler (it can be any subclass of BasicCrawler). Request queue is a default
-    # request provider, it will be opened, and fully managed if not specified.
+    # request manager, it will be opened, and fully managed if not specified.
     crawler = HttpCrawler()
 
     # Define the default request handler, which will be called for every request.

docs/guides/code/storages/rq_with_crawler_explicit_example.py

@@ -13,7 +13,7 @@ async def main() -> None:
     await request_queue.add_requests_batched(['https://apify.com/', 'https://crawlee.dev/'])
 
     # Create a new crawler (it can be any subclass of BasicCrawler) and pass the request
-    # list as request provider to it. It will be managed by the crawler.
+    # list as request manager to it. It will be managed by the crawler.
     crawler = HttpCrawler(request_manager=request_queue)
 
     # Define the default request handler, which will be called for every request.

src/crawlee/_autoscaling/snapshotter.py

@@ -102,10 +102,10 @@ def __init__(
 
     @classmethod
     def from_config(cls, config: Configuration | None = None) -> Snapshotter:
-        """Create a new instance based on the provided configuration.
+        """Create a new instance based on the provided `Configuration`.
 
         Args:
-            config: The configuration object. Uses the global (default) configuration if not provided.
+            config: The `Configuration` instance. Uses the global (default) one if not provided.
         """
         config = service_locator.get_configuration()
 
@@ -132,7 +132,7 @@ def _get_sorted_list_by_created_at(input_list: list[T]) -> SortedList[T]:
 
     @property
     def active(self) -> bool:
-        """Indicates whether the context is active."""
+        """Indicate whether the context is active."""
         return self._active
 
     async def __aenter__(self) -> Snapshotter:
@@ -178,7 +178,7 @@ async def __aexit__(
 
     @ensure_context
     def get_memory_sample(self, duration: timedelta | None = None) -> list[Snapshot]:
-        """Returns a sample of the latest memory snapshots.
+        """Return a sample of the latest memory snapshots.
 
         Args:
             duration: The duration of the sample from the latest snapshot. If omitted, it returns a full history.
@@ -191,7 +191,7 @@ def get_memory_sample(self, duration: timedelta | None = None) -> list[Snapshot]
 
     @ensure_context
     def get_event_loop_sample(self, duration: timedelta | None = None) -> list[Snapshot]:
-        """Returns a sample of the latest event loop snapshots.
+        """Return a sample of the latest event loop snapshots.
 
         Args:
             duration: The duration of the sample from the latest snapshot. If omitted, it returns a full history.
@@ -204,7 +204,7 @@ def get_event_loop_sample(self, duration: timedelta | None = None) -> list[Snaps
 
     @ensure_context
     def get_cpu_sample(self, duration: timedelta | None = None) -> list[Snapshot]:
-        """Returns a sample of the latest CPU snapshots.
+        """Return a sample of the latest CPU snapshots.
 
         Args:
             duration: The duration of the sample from the latest snapshot. If omitted, it returns a full history.
@@ -217,7 +217,7 @@ def get_cpu_sample(self, duration: timedelta | None = None) -> list[Snapshot]:
 
     @ensure_context
     def get_client_sample(self, duration: timedelta | None = None) -> list[Snapshot]:
-        """Returns a sample of the latest client snapshots.
+        """Return a sample of the latest client snapshots.
 
         Args:
             duration: The duration of the sample from the latest snapshot. If omitted, it returns a full history.
@@ -230,7 +230,7 @@ def get_client_sample(self, duration: timedelta | None = None) -> list[Snapshot]
 
     @staticmethod
     def _get_sample(snapshots: list[Snapshot], duration: timedelta | None = None) -> list[Snapshot]:
-        """Returns a time-limited sample from snapshots or full history if duration is None."""
+        """Return a time-limited sample from snapshots or full history if duration is None."""
         if not duration:
             return snapshots