docs: add `gnolang/faucet`

[leohhhn]

Description

Closes: #2120

This PR introduces the following changes to the docs (text copied over from the issue linked above):

• Adding a gnolang/faucet reference page in the Gno Tooling section,
• Adding a tutorial in the new Gno Infra section for setting up and running a faucet.

Matching docs PR (linked in the issue that this PR was created from)

Contributors' checklist...

• [x] Added new tests, or not needed, or not feasible
• [x] Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• [x] Updated the official documentation or not needed
• [x] No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• [x] Added references to related issues and PRs
• [ ] Provided any useful hints for running manual tests
• [ ] Added new benchmarks to generated graphs, if any. More info here.

[leohhhn]

Posted some questions here to clarify things not found in the reference docs

[leohhhn]

Crossposting from the issue for visibility:

• What kind of security against DDoS do we have implemented in the faucet?
• What are the request types the faucet can take?
• How do you actually send batch requests to the faucet?

What is the difference between these flags?

-config string                  the path to the command configuration file [TOML]
-faucet-config string           the path to the faucet TOML configuration, if any

[Kouteki]

@leohhhn is this PR still relevant?

[leohhhn]

@Kouteki

Closing this but we can reuse it later for the faucet/gnofaucet readme.