Use the new set of labels (#274)

The labels have been updated to better reflect the current state of the
project. Update all labels-related configuration to reflect this change.

Also for the labeler configuration add some missing files that were not
being labeled at all.

Author: llucax

.github/ISSUE_TEMPLATE/bug.yml

@@ -51,8 +51,9 @@ body:
         - Unit, integration and performance tests (part:tests)
         - Build script, CI, dependencies, etc. (part:tooling)
         - Channels, `Broadcast`, `Anycast`, etc. (part:channels)
-        - Select (part:select)
-        - Utility receivers, `Event`, `FileWatcher`, `Timer`, etc. (part:receivers)
+        - Core types (`Sender`, `Receiver`, exceptions, etc.) (part:core)
+        - Utilities (`Event`, `FileWatcher`, `Timer`, etc.) (part:utilities)
+        - Synchronization of multiple sources (`select()`, `merge()`, etc.) (part:synchronization)
     validations:
       required: true
   - type: textarea

.github/keylabeler.yml

@@ -13,9 +13,10 @@ caseSensitive: true
 # Explicit keyword mappings to labels. Form of match:label. Required.
 labelMappings:
   "part:channels": "part:channels"
+  "part:core": "part:core"
   "part:docs": "part:docs"
-  "part:receivers": "part:receivers"
-  "part:select": "part:select"
+  "part:synchronization": "part:synchronization"
   "part:tests": "part:tests"
   "part:tooling": "part:tooling"
+  "part:utilities": "part:utilities"
   "part:❓": "part:❓"

.github/labeler.yml

@@ -42,16 +42,22 @@
       - "src/frequenz/channels/_anycast.py"
       - "src/frequenz/channels/_broadcast.py"
 
-"part:receivers":
+"part:core":
   - changed-files:
     - any-glob-to-any-file:
-      - "src/frequenz/channels/_merge.py"
-      - "src/frequenz/channels/_merge_named.py"
-      - "src/frequenz/channels/event.py"
-      - "src/frequenz/channels/file_watcher.py"
-      - "src/frequenz/channels/timer.py"
+      - "src/frequenz/channels/_exceptions.py"
+      - "src/frequenz/channels/_receiver.py"
+      - "src/frequenz/channels/_sender.py"
 
-"part:select":
+"part:synchronization":
   - changed-files:
     - any-glob-to-any-file:
+      - "src/frequenz/channels/_merge.py"
       - "src/frequenz/channels/_select.py"
+
+"part:utilities":
+  - changed-files:
+    - any-glob-to-any-file:
+      - "src/frequenz/channels/event.py"
+      - "src/frequenz/channels/file_watcher.py"
+      - "src/frequenz/channels/timer.py"

docs/user-guide/receiving/multiple-sources/index.md renamed to docs/user-guide/receiving/synchronization/index.md

@@ -1,8 +1,9 @@
-# Multiple Sources
+# Synchronization of Multiple Sources
 
-If you need to receive values from multiple sources it can be complicated, as
-you probably want to get the first message of each receiver as soon as it is
-available. A naive approach like this will not work:
+If you need to receive messages from multiple sources in a synchronized way it
+could be difficult to, for example, receive the first message of each receiver
+as soon as it is available in one single task. A naive approach like this will
+not work:
 
 ```python
 receiver1: Receiver[int] = channel1.new_receiver()