pw_log: Add module metadata

Bug: 339741960
Change-Id: I21dedae708341cdecb95d9c21347b43a245b9eb4
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/214184
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Reviewed-by: Alexei Frolov <frolv@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Kayce Basques <kayce@google.com>

docs/module_metadata.json

@@ -211,6 +211,15 @@
       "C++17"
     ]
   },
+  "pw_log": {
+    "tagline": "Robust and portable logging for embedded projects",
+    "status": "stable",
+    "languages": [
+      "C++",
+      "Java",
+      "Python"
+    ]
+  },
   "pw_log_android": {
     "tagline": "Android logging backend",
     "status": "unstable",

pw_log/backends.rst

@@ -3,6 +3,9 @@
 ===============
 pw_log backends
 ===============
+.. pigweed-module-subpage::
+   :name: pw_log
+
 .. TODO: b/323607687 - Add backend guidance here
 
 .. toctree::

pw_log/docs.rst

@@ -3,6 +3,9 @@
 ======
 pw_log
 ======
+.. pigweed-module::
+   :name: pw_log
+
 Pigweed's logging module provides facilities for applications to log
 information about the execution of their application. The module is split into
 two components:

pw_log/protobuf.rst

@@ -3,6 +3,9 @@
 -------------------
 The pw_log protobuf
 -------------------
+.. pigweed-module-subpage::
+   :name: pw_log
+
 ``pw_log`` defines a protocol buffer for storing and transmitting log messages.
 The protobuf is optimized to be maximally efficient.
 

pw_log/tokenized_args.rst

@@ -3,6 +3,9 @@
 -----------------------
 Tokenized log arguments
 -----------------------
+.. pigweed-module-subpage::
+   :name: pw_log
+
 The ``pw_log`` facade is intended to make the logging backend invisible to the
 user, but some backend features require additional frontend support,
 necessitating a break in the abstraction. One of these features is the logging