docs: add more FEATURE.yaml documentation

For src/tools/g2, src/vlibapi, and src/vlibmemory

Type: docs

Signed-off-by: Dave Barach <dave@barachs.net>
Change-Id: I800c3e3a1ecb011d5e692d78a015e78342706786
diff --git a/src/tools/g2/FEATURE.yaml b/src/tools/g2/FEATURE.yaml
new file mode 100644
index 0000000..5b0c70c
--- /dev/null
+++ b/src/tools/g2/FEATURE.yaml
@@ -0,0 +1,12 @@
+---
+name: G2 graphical event log viewer
+maintainer:
+  - Dave Barach <dave@barachs.net>
+features:
+  - Vppinfra elog.[ch] log viewer
+  - Scales to over 10e6 events, 10e4 tracks
+  - Automated anomaly detector
+  - View snapshots
+description: "A highly scalable graphical event log viewer, specifically
+             tailored to displaying src/vppinfra/elog.[ch] log files"
+state: production