chore(ci): replace SourceKnight with setup-sp

[Rushaway]

Summary

Replaces the SourceKnight-based build (maxime1907/action-sourceknight) with a native GitHub Actions workflow that installs the SourcePawn compiler via rumblefrog/setup-sp and compiles the plugin directly, matching the pattern already rolled out to 59 other srcdslab repos (reference: srcdslab/sm-plugin-AdminRoom).

Plugin targets

Target name	.sp path
FunModes	addons/sourcemod/scripting/FunModes.sp

Dependencies (as declared in sourceknight.yaml, not independently verified)

Name	Repo URL	Unpack source → dest (as declared)
multicolors	https://github.com/srcdslab/sm-plugin-MultiColors	/addons/sourcemod/scripting/include → /addons/sourcemod/scripting/include
dynamicchannels	https://github.com/srcdslab/sm-plugin-DynamicChannels	/scripting/include → /addons/sourcemod/scripting/include
zombiereloaded	https://github.com/srcdslab/sm-plugin-zombiereloaded	/src/addons/sourcemod/scripting/include → /addons/sourcemod/scripting/include
KnockbackRestrict	https://github.com/srcdslab/sm-plugin-KnockbackRestrict	/addons/sourcemod/scripting/include → /addons/sourcemod/scripting/include
EntWatch	https://github.com/srcdslab/sm-plugin-EntWatch	/addons/sourcemod/scripting/include → /addons/sourcemod/scripting/include

The sourcemod (type: tar) dependency was dropped from the dependency-install step, matching the reference workflow which relies solely on rumblefrog/setup-sp for the compiler/include toolchain.

SourceMod version pinned to 1.12.x in rumblefrog/setup-sp (fixed per migration policy, regardless of the exact 1.12.0-git7221 version previously declared in sourceknight.yaml).

Packaging

The old workflow copied .sourceknight/package/* plus addons/sourcemod/translations into the release package. The new Create package step copies the real, existing paths found in the repo tree:

• addons/sourcemod/plugins/*.smx
• addons/sourcemod/configs
• addons/sourcemod/translations

No common/, cfg/, materials/, models/, or gamedata/ directories exist in this repo, so nothing else was added.

Not locally validated

This migration was done without cloning dependency repos or running spcomp locally, per the lightweight migration policy. Dependency paths above are taken as declared in sourceknight.yaml and have not been independently verified. CI on this PR will be the first real build/compile validation.

Manual verification needed

• DynamicChannels and KnockbackRestrict are consumed via #tryinclude (optional/soft dependency) in FunModes.sp and Fun_Modes/CrazyShop.sp respectively. They are still cloned and their includes copied in the new workflow (matching the declared sourceknight.yaml dependencies), but since they're optional includes, please confirm the build succeeds/behaves as expected either way.
• Please confirm CI passes (compile + package) once this PR runs, since no local compilation was performed.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.