feat: use JSON, templates, npx, and add dry-run support

[avivkeller]

Fixes #3
Closes #185

---

This PR makes a few substantial changes to improve the DX of this tool.

• Moves from INI/env files in templates/ to JSON configurations in configs/, this'll make it easier to edit and parse (See fix(properties): allow quote-less props #185 for an example of dotenv struggles)
• Adds a --dry-run argument, as, when testing this, it's important not to create the issues and notes
• Adds, and relies on, npx-style support. (i.e. npx . tsc or npx https://github.com/nodejs/create-node-meeting-artifacts tsc
  • With this in mind, it makes sense to put the entrypoint in src/, since it no longer really needs to be easily accessible for scripts, it'll be npx-ed.
• Moves from a custom template system to Mustache.
• Uses a dynamic matrix in GH Actions
• Removes obsolete teams (with archived repositories)

The goal here is:

• Improve DX
• Less code to maintain

For example, running npx . web --dry-run produces:

[dry-run] Would create HackMD meeting notes document.
[dry-run] Would create GitHub issue with title: Node.js Web Team Meeting 2025-09-29
[dry-run] Would use the following content:
 ## Time

**UTC Mon, Sep 29, 2025, 07:00 PM**:

| Timezone | Date/Time |
| -------- | --------- |
| US / Pacific | Mon, Sep 29, 2025, 12:00 PM |
| US / Mountain | Mon, Sep 29, 2025, 01:00 PM |
| US / Central | Mon, Sep 29, 2025, 02:00 PM |
| US / Eastern | Mon, Sep 29, 2025, 03:00 PM |
| EU / Western | Mon, Sep 29, 2025, 08:00 PM |
| EU / Central | Mon, Sep 29, 2025, 09:00 PM |
| EU / Eastern | Mon, Sep 29, 2025, 10:00 PM |
| Moscow | Mon, Sep 29, 2025, 10:00 PM |
| Chennai | Tue, Sep 30, 2025, 12:30 AM |
| Hangzhou | Tue, Sep 30, 2025, 03:00 AM |
| Tokyo | Tue, Sep 30, 2025, 04:00 AM |
| Sydney | Tue, Sep 30, 2025, 05:00 AM |

Or in your local time:

* https://www.timeanddate.com/worldclock/fixedtime.html?msg=Node.js+Foundation+Node.js%20Web%20Team+Meeting+2025-09-29&iso=20250929T190000
* https://www.wolframalpha.com/input/?i=07%3A00%20PM+UTC%2C+Sep%2029%2C%202025+in+local+time

## Links

* https://hackmd.io/dry-run

## Agenda

Extracted from **web-agenda** labelled issues and pull requests from @nodejs prior to the meeting.

### nodejs/doc-kit

* Generate Type Declarations [#437](https://github.com/nodejs/doc-kit/issues/437)

### nodejs/nodejs.org

* content(`userland-migration`): make up to date [#8053](https://github.com/nodejs/nodejs.org/pull/8053)

### nodejs/web-team

* Create Means for Private Communications [#14](https://github.com/nodejs/web-team/issues/14)

## Invited

* @nodejs/web

### Observers/Guests


## Joining the meeting

* To join this meeting, visit <https://zoom-lfx.platform.linuxfoundation.org/meeting/91972207331?password=419d8029-a3c7-4536-9666-d9e97c0f0f93>.
* To observe this meeting, visit <https://livestream.openjsf.org>.
[dry-run] Would update HackMD document with self-referencing link.
[dry-run] Would use the following notes content:
 ## Time

**UTC Mon, Sep 29, 2025, 07:00 PM**:

| Timezone | Date/Time |
| -------- | --------- |
| US / Pacific | Mon, Sep 29, 2025, 12:00 PM |
| US / Mountain | Mon, Sep 29, 2025, 01:00 PM |
| US / Central | Mon, Sep 29, 2025, 02:00 PM |
| US / Eastern | Mon, Sep 29, 2025, 03:00 PM |
| EU / Western | Mon, Sep 29, 2025, 08:00 PM |
| EU / Central | Mon, Sep 29, 2025, 09:00 PM |
| EU / Eastern | Mon, Sep 29, 2025, 10:00 PM |
| Moscow | Mon, Sep 29, 2025, 10:00 PM |
| Chennai | Tue, Sep 30, 2025, 12:30 AM |
| Hangzhou | Tue, Sep 30, 2025, 03:00 AM |
| Tokyo | Tue, Sep 30, 2025, 04:00 AM |
| Sydney | Tue, Sep 30, 2025, 05:00 AM |

Or in your local time:

* https://www.timeanddate.com/worldclock/fixedtime.html?msg=Node.js+Foundation+Node.js%20Web%20Team+Meeting+2025-09-29&iso=20250929T190000
* https://www.wolframalpha.com/input/?i=07%3A00%20PM+UTC%2C+Sep%2029%2C%202025+in+local+time

## Links

* https://hackmd.io/dry-run
* https://github.com/dry-run/issue

## Agenda

Extracted from **web-agenda** labelled issues and pull requests from @nodejs prior to the meeting.

### nodejs/doc-kit

* Generate Type Declarations [#437](https://github.com/nodejs/doc-kit/issues/437)

### nodejs/nodejs.org

* content(`userland-migration`): make up to date [#8053](https://github.com/nodejs/nodejs.org/pull/8053)

### nodejs/web-team

* Create Means for Private Communications [#14](https://github.com/nodejs/web-team/issues/14)

## Invited

* @nodejs/web

### Observers/Guests


## Joining the meeting

* To join this meeting, visit <https://zoom-lfx.platform.linuxfoundation.org/meeting/91972207331?password=419d8029-a3c7-4536-9666-d9e97c0f0f93>.
* To observe this meeting, visit <https://livestream.openjsf.org>.
Created GitHub issue: https://github.com/dry-run/issue
Created HackMD document: https://hackmd.io/dry-run
Dry run mode: no data was created or updated.