chore(deps): make release pipeline create binary

[olamilekan000]

change updates the release pipeline to build and publish binaries.

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Note

Medium Risk
Changes how production binaries and Homebrew formulas are published; misconfigured HOMEBREW_TAP_TOKEN or token permissions could break releases or leave install paths stale.

Overview
Shifts binary distribution from Cloudsmith to GitHub Releases and updates how releases are automated end-to-end.

The release workflow drops Python/Cloudsmith CLI setup and CLOUDSMITH_API_KEY, switches GITHUB_TOKEN from secrets.RELEASE_TOKEN to the workflow github.token, and passes HOMEBREW_TAP_TOKEN into GoReleaser for tap updates.

.publisher.yml is bumped to GoReleaser v2, removes all Cloudsmith publishers, wires Homebrew to cobin-archive with download URLs from github.com/frain-dev/convoy/releases, and simplifies the release block (no lib release id).

RELEASE.md and docs/monthly-release-workflow.md describe the new flow: GoReleaser creates/publishes the GitHub Release (archives, deb/rpm, checksums), updates frain-dev/homebrew-tools, and documents the required HOMEBREW_TAP_TOKEN secret—replacing the old manual “publish release” / Cloudsmith steps.

^{Reviewed by Cursor Bugbot for commit b63b4ac. Bugbot is set up for automated code reviews on this repo. Configure here.}

[mekilis]

Approving. Removes Cloudsmith cleanly (publishers, the install step, and the CLOUDSMITH_API_KEY env), switches release auth to github.token, adds HOMEBREW_TAP_TOKEN, and publishes binaries/packages/checksums to the GitHub Release with the brew formula pulling from there. version: 2 bump is correct too.

Note: PR CI only covers lint/tests, not the release path. Real validation is the next v* tag running the Release Go Binaries workflow green (goreleaser creating the GitHub Release with assets and updating homebrew-tools).