remove installation prerequisites and TLS interception sections from README

Simplified README by removing detailed sections:

## Removed Installation Prerequisites
- Linux kernel version requirements
- iptables/pfctl dependencies
- Go version requirements
- sudo access notes

## Removed TLS Interception Section
- CA certificate storage details
- Environment variable explanations
- Certificate generation process
- Usage examples with --no-tls-intercept

## Kept Essential Information
- --no-tls-intercept flag in command-line options (without description)
- Core functionality and usage examples
- Installation and development instructions

Rationale: Users will discover missing dependencies when they try to
use the tool. TLS interception details are implementation specifics
that users don't need to understand upfront.

The README is now more focused and less intimidating for new users.

Co-authored-by: f0ssel <[email protected]>

Author: blink-so[bot]

README.md

@@ -154,22 +154,6 @@ sudo mv jail /usr/local/bin/
 
 ### Build from Source
 
-#### Prerequisites
-
-**Linux:**
-- Linux kernel 3.8+ (network namespace support)
-- iptables
-- Go 1.25+ (for building)
-- sudo access
-
-**macOS:**
-- macOS 10.15+ (Catalina or later)
-- pfctl (included)
-- Go 1.25+ (for building)
-- sudo access
-
-#### Building
-
 ```bash
 git clone https://github.com/coder/jail
 cd jail
@@ -181,21 +165,6 @@ make build
 go build -o jail .
 ```
 
-## TLS Interception
-
-jail automatically generates a Certificate Authority (CA) to intercept HTTPS traffic:
-
-- CA stored in `~/.config/jail/` (or `$XDG_CONFIG_HOME/jail/`)
-- CA certificate provided via `JAIL_CA_CERT` environment variable
-- Certificates generated on-demand for intercepted domains
-- CA expires after 1 year
-
-### Disable TLS Interception
-
-```bash
-jail --no-tls-intercept --allow "*" -- ./app
-```
-
 ## Command-Line Options
 
 ```text