Add development chain-spec file for minimal/parachain templates for Omni Node compatibility

[EleisonC]

Description

This PR adds development chain specs for the minimal and parachain templates. #6334

Integration

This PR adds development chain specs for the minimal and para chain template runtimes, ensuring synchronization with runtime code. It updates zombienet-omni-node.toml, zombinet.toml files to include valid chain spec paths, simplifying configuration for zombienet in the parachain and minimal template.

Review Notes

1. Overview of Changes:

• Added development chain specs for use in the minimal and parachain template.
• Updated zombienet-omni-node.toml and zombinet.toml files in the minimal and parachain templates to include paths to the new dev chain specs.

2. Integration Guidance:
   NB: Follow the templates' READMEs from the polkadot-SDK master branch. Please build the binaries and runtimes based on the polkadot-SDK master branch.

• Ensure you have set up your runtimes parachain-template-runtime and minimal-template-runtime
• Ensure you have installed the nodes required ie parachain-template-node and minimal-template-node
• Set up Zombinet
• For running the parachains, you will need to install the polkadot cargo install --path polkadot remember from the polkadot-SDK master branch.
• Inside the template folders minimal or parachain, run the command to start with Zombienet with Omni Node, Zombienet with minimal-template-node or Zombienet with parachain-template-node

Include your leftover TODOs, if any, here.

• Test the syncing of chain specs with runtime's code.

[cla-bot-2021]

User @EleisonC, please sign the CLA here.