Update README and documentation with new CI Feedback tool

docs/CI_FEEDBACK.md

@@ -0,0 +1,31 @@
+# CI Feedback Tool
+
+The CI feedback tool (`/checks)` automatically triggers when a PR has a failed check.
+The tool analyzes the failed checks and provides several feedbacks:
+- Failed stage
+- Failed test name
+- Failure summary
+- Relevant error logs
+
+<kbd>
+<img src="https://www.codium.ai/images/pr_agent/failed_check1.png" width="768">
+</kbd>
+
+&rarr;
+<kbd>
+<img src="https://www.codium.ai/images/pr_agent/failed_check2.png" width="768">
+</kbd>
+
+___
+
+In addition to being automatically triggered, the tool can also be invoked manually by commenting on a PR:
+```
+/checks "https://github.com/{repo_name}/actions/runs/{run_number}/job/{job_number}"
+```
+where `{repo_name}` is the name of the repository, `{run_number}` is the run number of the failed check, and `{job_number}` is the job number of the failed check.
+
+### Configuration options
+- `enable_auto_checks_feedback` - if set to true, the tool will automatically provide feedback when a check is failed. Default is true.
+- `excluded_checks_list` - a list of checks to exclude from the feedback, for example: ["check1", "check2"]. Default is an empty list.
+- `persistent_comment` - if set to true, the tool will overwrite a previous checks comment with the new feedback. Default is true.
+

docs/TOOLS_GUIDE.md

@@ -9,5 +9,6 @@
 - [GENERATE CUSTOM LABELS](./GENERATE_CUSTOM_LABELS.md) 💎
 - [Analyze](./Analyze.md) 💎
 - [Test](./TEST.md) 💎
+- [CI Feedback](./CI_FEEDBACK.md) 💎
 
 See the **[installation guide](/INSTALL.md)** for instructions on setting up PR-Agent.