Merge pull request #2632 from VedantMadane/docs/readme-documentation-section

docs: integrate Quick Start guide and documentation into README

Author: jackc

README.md

@@ -12,7 +12,15 @@ The toolkit component is a related set of packages that implement PostgreSQL fun
 and type mapping between PostgreSQL and Go. These underlying packages can be used to implement alternative drivers,
 proxies, load balancers, logical replication clients, etc.
 
-## Example Usage
+## Quick Start
+
+### Installation
+
+```bash
+go get github.com/jackc/pgx/v5
+```
+
+### Example Usage
 
 ```go
 package main
@@ -46,7 +54,18 @@ func main() {
 }
 ```
 
-See the [getting started guide](https://github.com/jackc/pgx/wiki/Getting-started-with-pgx) for more information.
+### Connection Configuration
+
+`pgx.Connect` and `pgxpool.New` accept PostgreSQL connection URLs (such as `postgres://user:pass@host:5432/db?sslmode=verify-full`) as well as `key=value` strings. See [`pgconn.ParseConfig`](https://pkg.go.dev/github.com/jackc/pgx/v5/pgconn#ParseConfig) and the [PostgreSQL connection string documentation](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-CONNSTRING) for supported options and environment variables.
+
+For a step-by-step walkthrough, see the [getting started guide](https://github.com/jackc/pgx/wiki/Getting-started-with-pgx).
+
+## Documentation
+
+Package documentation and API reference are available on [pkg.go.dev](https://pkg.go.dev/github.com/jackc/pgx/v5):
+* [`pgx`](https://pkg.go.dev/github.com/jackc/pgx/v5) — base PostgreSQL driver
+* [`pgxpool`](https://pkg.go.dev/github.com/jackc/pgx/v5/pgxpool) — concurrency-safe connection pool
+* [`stdlib`](https://pkg.go.dev/github.com/jackc/pgx/v5/stdlib) — `database/sql` compatibility adapter
 
 ## Features