feat: add TapeConfig in main.rs and cli.rs

> loadup tape.toml and pass the configs to cli
> remove the default `l` option for cluster
> add condition to override cluster (rpc_url) with options in cli
> if options for clusters are not used in cli, rpc_url from
tape.tomlwill be used

Author: 4rjunc

cli/src/cli.rs

@@ -10,6 +10,7 @@ use std::path::PathBuf;
 use std::sync::Arc;
 
 use crate::keypair::{get_keypair_path, get_payer};
+use crate::config::TapeConfig;
 
 #[derive(Parser)]
 #[command(
@@ -28,11 +29,10 @@ pub struct Cli {
     #[arg(
         short = 'u', 
         long = "cluster", 
-        default_value = "l", 
         global = true,
         help = "Cluster to use: l (localnet), m (mainnet), d (devnet), t (testnet),\n or a custom RPC URL"
     )]
-    pub cluster: Cluster,
+    pub cluster: Option<Cluster>,
 
     #[arg(short = 'v', long = "verbose", help = "Print verbose output", global = true)]
     pub verbose: bool,
@@ -239,8 +239,12 @@ pub struct Context {
 }
 
 impl Context{
-    pub fn try_build(cli:&Cli) -> Result<Self> {
-        let rpc_url = cli.cluster.rpc_url();
+    pub fn try_build(cli:&Cli, config: &TapeConfig) -> Result<Self> {
+        let rpc_url = if let Some(cluster) = &cli.cluster {
+            cluster.rpc_url()
+        } else {
+            config.solana.rpc_url.to_string()
+        };
         let rpc = Arc::new(
             RpcClient::new_with_commitment(rpc_url.clone(),
             CommitmentConfig::finalized())

cli/src/main.rs

@@ -3,6 +3,7 @@ mod keypair;
 mod log;
 mod commands;
 mod utils;
+mod config;
 
 
 use anyhow::{Ok, Result};
@@ -13,6 +14,7 @@ use env_logger::{self, Env};
 use tape_network::store::TapeStore;
 
 use crate::cli::Context;
+use crate::config::TapeConfig;
 
 
 fn main() -> Result<()>{
@@ -38,8 +40,12 @@ async fn run_tape_cli() -> Result<()> {
 
     let cli = Cli::parse();
 
+    let config = TapeConfig::load().unwrap_or_else(|_| {
+        log::print_info("tape.toml not found, creating default configuration");
+        TapeConfig::create_default().expect("Failed to create default config")
+    });
 
-    let context = Context::try_build(&cli)?;
+    let context = Context::try_build(&cli, &config)?;
 
     match cli.command {
         Commands::Init {} |