chore(docs): add change log files

Author: omarabid

CHANGELOG.md

@@ -0,0 +1,41 @@
+# v0.4.0
+## API Changes
+- Backend now support passing a configuration struct.
+- TimerSignal enum
+- pprof-rs backend is split into a different package. It has to be imported manually.
+
+## What's Changed
+* fix: avoid binding two unrelated vars to the same type by @drahnr in https://github.com/pyroscope-io/pyroscope-rs/pull/18
+* avoid almost all unwraps by @drahnr in https://github.com/pyroscope-io/pyroscope-rs/pull/14
+* use more features of `thiserror` by @drahnr in https://github.com/pyroscope-io/pyroscope-rs/pull/11
+* introduce LOG_TAGs, avoid repetitive prefixes by @drahnr in https://github.com/pyroscope-io/pyroscope-rs/pull/10
+* allow configurable accumulation_cycle by @drahnr in https://github.com/pyroscope-io/pyroscope-rs/pull/21
+* Add CI Targets by @omarabid in https://github.com/pyroscope-io/pyroscope-rs/pull/22
+* 0.4.0 release by @omarabid in https://github.com/pyroscope-io/pyroscope-rs/pull/23
+
+## New Contributors
+* @drahnr made their first contribution in https://github.com/pyroscope-io/pyroscope-rs/pull/18
+
+**Full Changelog**: https://github.com/pyroscope-io/pyroscope-rs/compare/0.3.1...lib-0.4.0
+
+# v0.3.1
+Minor release with bug fixes.
+
+## Bug Fixes
+- **session**: avoid breaking SessionManager if request fails ([Abid Omar](https://github.com/pyroscope-io/pyroscope-rs/commit/1254bcc9a3b0d76b7adbeb82ba21f33b875c0b39))
+- **typo**: variable name typo ([Abid Omar](https://github.com/pyroscope-io/pyroscope-rs/commit/0d8caffbe7855bec8158333dba2923cd07286a5f))
+- **pprof**: fix #12 ([Abid Omar](https://github.com/pyroscope-io/pyroscope-rs/commit/936d3d99a2cc82812bc8251fd2fbf8152a87d4cb))
+- **copyright**: fix #13 ([Abid Omar](https://github.com/pyroscope-io/pyroscope-rs/commit/b8eaf13137810df932e1b70e33b3ad3e25b65ece))
+
+## Code Refactoring
+- **option**: replace unwrap for various Options ([Abid Omar](https://github.com/pyroscope-io/pyroscope-rs/commit/3fd4e794d74523855c66f65c0b7fc8ff9dfe4604))
+- **time**: add get_time_range ([Abid Omar](https://github.com/pyroscope-io/pyroscope-rs/commit/a6d4dbcef494b2bfe8016a817201499937cf3528))
+
+# v0.3.0
+First stable release
+
+# v0.0.2-alpha
+Second beta release
+
+# v0.0.1-alpha
+Initial beta release

pyroscope_backends/pyroscope_pprofrs/CHANGELOG.md

@@ -0,0 +1,2 @@
+# v0.1.0
+Initial release

pyroscope_backends/pyroscope_pyspy/CHANGELOG.md

@@ -0,0 +1,2 @@
+# v0.1.0
+Initial release

pyroscope_backends/pyroscope_rbspy/CHANGELOG.md

@@ -0,0 +1,2 @@
+# v0.1.0
+Initial release

pyroscope_cli/CHANGELOG.md

@@ -0,0 +1,2 @@
+# v0.1.0
+Initial release