Update maintainers and add CODEOWNERs

CODEOWNERS

@@ -0,0 +1,8 @@
+# Default owners for everything in the repo, unless a later match takes precedence.
+* @grafana/pyroscope-team
+
+# Documentation.
+/docs/ @grafana/docs-profiles @grafana/pyroscope-team
+
+# eBPF collector
+/ebpf/ @korniltsev

MAINTAINERS.md

@@ -1,10 +1,15 @@
 The following are the main/default maintainers:
 
+- Anton Kolesnikov [@kolesnikovae](https://github.com/kolesnikovae) ([Grafana Labs](https://grafana.com/))
 - Christian Simon — [@simonswine](https://github.com/simonswine) ([Grafana Labs](https://grafana.com/))
 - Cyril Tovena — [@cyriltovena](https://github.com/cyriltovena) ([Grafana Labs](https://grafana.com/))
+- Dmitry Filimonov - [@petethepig](https://github.com/petethepig) ([Grafana Labs](https://grafana.com/))
+- Ryan Perry - [@Rperry2174](https://github.com/Rperry2174) ([Grafana Labs](https://grafana.com/))
 
 Some parts of the codebase have other maintainers, the package paths also include all sub-packages:
 
 - `docs`:
-  - Eve Meelan - [@](https://github.com/) ([Grafana Labs](https://grafana.com/))
+  - Eve Meelan - [@Eve832](https://github.com/Eve832) ([Grafana Labs](https://grafana.com/))
 
+- `ebpf`:
+  - Tolya Korniltsev - [@korniltsev](https://github.com/korniltsev) ([Grafana Labs](https://grafana.com/))