Rename Scheduler API and docs to Executor / Contributte\Executor

[ohmyfelix]

Goal

Finish the package rebrand so the code, docs, and public API consistently use Executor / Contributte\Executor instead of the old Scheduler naming.

The repository is already contributte/executor, but the package still exposes a large Scheduler surface.

Scope

• Rename PHP namespaces from Contributte\Scheduler\... to Contributte\Executor\...
• Rename core public classes/interfaces:
  • IScheduler -> IExecutor
  • Scheduler -> Executor
  • LockingScheduler -> LockingExecutor
  • SchedulerExtension -> ExecutorExtension
• Update all imports/usages across src/ and tests/
• Rename console commands from scheduler:* to executor:*
• Rename DI/docs config examples from scheduler: to executor:
• Update lock-path and other examples from scheduler to executor
• Update package/docs metadata and branding:
  • composer.json
  • README.md
  • .docs/README.md
  • ruleset.xml
  • badges, links, package name references, homepage, descriptions

Affected areas

Code

• src/IScheduler.php
• src/Scheduler.php
• src/LockingScheduler.php
• src/DI/SchedulerExtension.php
• namespace updates in the rest of src/
• command classes under src/Command/

Tests

• tests/Cases/DI/SchedulerExtension.phpt
• fixtures importing Contributte\Scheduler\...

Metadata / docs

• composer.json
• README.md
• .docs/README.md
• ruleset.xml

Backward compatibility

This rename changes the public API, so we should decide whether to:

1. do a hard break for the next major release, or
2. ship temporary deprecated BC shims

Recommended approach: add temporary BC shims for one transition release.

That would mean:

• deprecated class/interface aliases or forwarding wrappers for old Contributte\Scheduler\... symbols
• deprecated scheduler:* command aliases
• temporary support for old scheduler: config in DI extension if practical

Proposed implementation order

1. Rename PHP namespace and public symbols to Contributte\Executor
2. Update DI extension naming and service/config surface
3. Rename console commands to executor:*
4. Add BC layer for old names/commands/config if we want a transition period
5. Update docs, README, badges, package metadata, and examples
6. Run tests/QA and do a final search for leftover references:
   • Contributte\\Scheduler
   • scheduler:
   • contributte/scheduler
   • github.com/contributte/scheduler

Verification

• DI container compiles with the new extension/config
• console exposes the new executor:* commands
• docs/examples match the final API
• no stale Scheduler branding remains except intentional BC shims
• tests and QA pass

Notes

The repo is already named contributte/executor, so this issue is mainly about aligning the codebase and documentation with the repository/package direction.