github(both): improve README.md and simplify PR templates

.github/pull_request_template.md

@@ -1,5 +1,6 @@
 <!--
-Thank you for contributing to TiDB-CDC! Please read MD's [CONTRIBUTING](https://github.com/pingcap/tidb-cdc/blob/master/CONTRIBUTING.md) document **BEFORE** filing this PR.
+Thank you for contributing to TiFlow! 
+Please read MD's [CONTRIBUTING](https://github.com/pingcap/tiflow/blob/master/CONTRIBUTING.md) document **BEFORE** filing this PR.
 -->
 
 ### What problem does this PR solve?
@@ -19,37 +20,22 @@ Issue Number: close #xxx
 
 ### Check List <!--REMOVE the items that are not applicable-->
 
-Tests <!-- At least one of them must be included. -->
+#### Tests <!-- At least one of them must be included. -->
 
  - Unit test
  - Integration test
  - Manual test (add detailed scripts or steps below)
  - No code
 
-Code changes
+#### Questions <!-- Authors should answer these questions and reviewers should consider these questions. -->
 
- - Has exported function/method change
- - Has exported variable/fields change
- - Has interface methods change
- - Has persistent data change
+##### Will it cause performance regression or break compatibility?
 
-Side effects
-
- - Possible performance regression
- - Increased code complexity
- - Breaking backward compatibility
-
-Related changes
-
- - Need to cherry-pick to the release branch
- - Need to update the documentation
- - Need to update key monitor metrics in both TiCDC document and official document
+##### Do you need to update user documentation, design documentation or monitoring documentation?
 
 ### Release note <!-- bugfixes or new feature need a release note -->
 
 ```release-note
-Please add a release note.
-
 Please refer to [Release Notes Language Style Guide](https://pingcap.github.io/tidb-dev-guide/contribute-to-tidb/release-notes-style-guide.html) to write a quality release note.
 
 If you don't think this PR needs a release note then fill it with `None`.

README.md

@@ -8,7 +8,15 @@
 
 ## Introduction
 
-**TiFlow** is a unified data replication platform around [TiDB](https://docs.pingcap.com/tidb/stable), including two main components: DM and TiCDC. DM supports full data migration and incremental data replication from MySQL/MariaDB into [TiDB](https://docs.pingcap.com/tidb/stable). TiCDC supports replicating change data to various downstreams, including MySQL protocol-compatible databases, message queues via the open TiCDC protocol and other systems such as local file storage. More details can be found in [DM README](./README_DM.md) and [TiCDC README](./README_TiCDC.md).
+**TiFlow** is a unified data replication platform around [TiDB](https://docs.pingcap.com/tidb/stable),
+including two main components:
+
+* DM supports full data migration and incremental data replication from MySQL/MariaDB
+  into [TiDB](https://docs.pingcap.com/tidb/stable).
+* TiCDC supports replicating change data to various downstreams, including MySQL protocol-compatible databases
+  and [Kafka](https://kafka.apache.org/).
+
+More details can be found in [DM README](./README_DM.md) and [TiCDC README](./README_TiCDC.md).
 
 ## License
 

README_TiCDC.md

@@ -1,6 +1,8 @@
 # TiCDC
 
-**TiCDC** is [TiDB](https://docs.pingcap.com/tidb/stable)'s change data capture framework. It supports replicating change data to various downstreams, including MySQL protocol-compatible databases, message queues via the open CDC protocol and other systems such as local file storage.
+**TiCDC** is [TiDB](https://docs.pingcap.com/tidb/stable)'s change data capture framework.
+It supports replicating change data to various downstreams, including MySQL protocol-compatible databases
+and [Kafka](https://kafka.apache.org/).
 
 ## Architecture
 
@@ -23,21 +25,22 @@ See a detailed introduction to [the TiCDC architecture](https://docs.pingcap.com
 To check the source code, run test cases and build binaries, you can simply run:
 
 ```bash
-$ make
+$ make cdc
 $ make test
 ```
 
-Note that TiCDC supports building with Go version `Go >= 1.16`.
+Note that TiCDC supports building with Go version `Go >= 1.18`.
 
 When TiCDC is built successfully, you can find binary in the `bin` directory. Instructions for unit test and integration
 test can be found in [Running tests](./tests/integration_tests/README.md).
 
 ## Deployment
 
-You can setup a CDC cluster for replication test manually as following:
+You can set up a CDC cluster for replication test manually as following:
 
-1. Setup a TiDB cluster.
-2. Start a CDC cluster, which contains one or more CDC servers. The command to start on CDC server is `cdc server --pd http://10.0.10.25:2379`, where `http://10.0.10.25:2379` is the client-url of pd-server.
+1. Set up a TiDB cluster.
+2. Start a CDC cluster, which contains one or more CDC servers. The command to start on CDC server
+   is `cdc server --pd http://10.0.10.25:2379`, where `http://10.0.10.25:2379` is the client-url of pd-server.
 3. Start a replication changefeed by `cdc cli changefeed create --pd http://10.0.10.25:2379 --start-ts 413105904441098240 --sink-uri mysql://root:[email protected]:3306/`. The TSO is TiDB `timestamp oracle`. If it is not provided or set to zero, the TSO of start time will be used. Currently, we support MySQL protocol-compatible databases as downstream sinks only, and will add more sink types in the future.
 
 For details, see [Deploy TiCDC](https://docs.pingcap.com/tidb/stable/deploy-ticdc).