fix: replace deprecated invoke --wasm with deploy-then-invoke workflow

[kaankacar]

The --wasm flag was removed from stellar contract invoke in CLI. Contracts must now be deployed first, then invoked by contract ID.

Updated 7 example contract tutorials to use the correct two-step workflow:

1. Deploy with stellar contract deploy --wasm ... --alias ... --network testnet
2. Invoke with stellar contract invoke --id <alias> --network testnet

Files updated:

• TEMPLATE.mdx
• auth.mdx
• events.mdx
• liquidity-pool.mdx
• logging.mdx
• storage.mdx (also fixed incorrect wasm filename reference)
• tokens.mdx

Fixes #2212

[Copilot]

Pull request overview

This PR updates several example smart contract tutorials to reflect the current Stellar CLI workflow, which no longer supports stellar contract invoke --wasm and requires a deploy-then-invoke pattern using contract IDs or aliases. The docs now consistently show: building the WASM, deploying it with stellar contract deploy --wasm ... --alias ... --network testnet, and then invoking via stellar contract invoke --id <alias> --network testnet.

Changes:

• Replaced all stellar contract invoke --wasm ... --id 1 patterns in example contracts with a two-step deploy (contract deploy --wasm ... --alias ... --source-account ... --network testnet) then invoke (contract invoke --id <alias> --source-account ... --network testnet) workflow.
• Standardized deployment/invocation sections with ### Deploy / ### Invoke tabs and consistent use of --source-account and --network testnet across UNIX and PowerShell examples.
• Fixed the storage example to reference the correct WASM filename for the increment contract and aligned its deploy/invoke examples with the new pattern.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/build/smart-contracts/example-contracts/TEMPLATE.mdx	Updates the template example to first deploy the hello-world contract with an alias (hello) on testnet and then invoke it by alias, replacing the deprecated invoke --wasm usage.
docs/build/smart-contracts/example-contracts/auth.mdx	Adds identity setup on testnet, introduces a deploy step with --alias auth, and updates all auth contract invocations (including --auth and contract read) to use --id auth and --network testnet.
docs/build/smart-contracts/example-contracts/events.mdx	Replaces direct invoke --wasm calls with explicit deploy of the events contract (--alias events) followed by invoke examples that target --id events on testnet.
docs/build/smart-contracts/example-contracts/liquidity-pool.mdx	Refactors the liquidity pool “Run the Contract” section into deploy (with alias liquidity-pool) and invoke sections, updating commands to use --id liquidity-pool and --network testnet instead of invoke --wasm.
docs/build/smart-contracts/example-contracts/logging.mdx	Splits logging example into deploy (with --alias logging) and verbose invoke (stellar -v contract invoke --id logging ... --network testnet), removing the invalid --wasm flag from invoke.
docs/build/smart-contracts/example-contracts/storage.mdx	Adjusts the storage example to deploy the correct increment contract WASM under alias increment and invoke it via --id increment on testnet, eliminating the old invoke --wasm example.
docs/build/smart-contracts/example-contracts/tokens.mdx	Updates token contract docs to deploy the token contract as alias token and show balance queries via contract invoke --id token ... --network testnet for both UNIX and PowerShell.

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