added searcher cli readme

examples/searcher_cli/README.md

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+# Searcher CLI
+Searcher CLI is a command-line tool used to interact with a gRPC searcher server.
+
+## Usage
+Searcher CLI can be used with the following commands:
+
+### 1. Send Bid
+Used to send a bid.
+
+```bash
+searcher-cli send-bid --txhash <transaction_hash> --amount <bid_amount> --block <block_number>
+```
+* `--txhash`: Transaction hash.
+* `--amount`: Bid amount.
+* `--block`: Block number.
+
+### 2. Check Status
+Used to check the status of the gRPC searcher server.
+
+```bash
+searcher-cli status
+```
+
+### 3. Send Random Bid
+Used to send a random bid.
+
+```bash
+searcher-cli send-rand-bid
+```
+
+## Configuration
+Configuration options can be set using the config.yml file. An example configuration file is as follows:
+
+```yaml
+server_address: "localhost:13524"
+log_fmt: "text"
+log_level: "info"
+```
+
+* `server_address`: The address and port of the gRPC searcher server.
+* `log_fmt`: Log format (text or json).
+* `log_level`: Log level (debug, info, warn, error).
+
+You can modify these settings to suit your specific environment and preferences.
+