chore(ci): externalize workflow scripts and relocate main flow doc (#722)

* feat: Add GitHub Actions workflows for security audits, CodeQL analysis, contributor updates, performance benchmarks, integration tests, fuzz testing, and reusable Rust build jobs

- Implemented `sec-audit.yml` for Rust package security audits using `rustsec/audit-check` and `cargo-deny-action`.
- Created `sec-codeql.yml` for CodeQL analysis scheduled twice daily.
- Added `sync-contributors.yml` to update the NOTICE file with new contributors automatically.
- Introduced `test-benchmarks.yml` for performance benchmarks using Criterion.
- Established `test-e2e.yml` for running integration and end-to-end tests.
- Developed `test-fuzz.yml` for fuzz testing with configurable runtime.
- Created `test-rust-build.yml` as a reusable job for executing Rust commands with customizable parameters.
- Documented main branch delivery flows in `main-branch-flow.md` for clarity on CI/CD processes.

* ci(workflows): update workflow scripts and rename for clarity; remove obsolete lint feedback script

* chore(ci): externalize workflow scripts and relocate main flow doc

.github/workflows/security.yml

@@ -1,45 +0,0 @@
-name: Rust Package Security Audit
-
-on:
-    push:
-        branches: [main]
-    pull_request:
-        branches: [main]
-    schedule:
-        - cron: "0 6 * * 1" # Weekly on Monday 6am UTC
-
-concurrency:
-    group: security-${{ github.event.pull_request.number || github.ref }}
-    cancel-in-progress: true
-
-permissions:
-    contents: read
-    security-events: write
-    actions: read
-    checks: write
-
-env:
-    CARGO_TERM_COLOR: always
-
-jobs:
-    audit:
-        name: Security Audit
-        runs-on: blacksmith-2vcpu-ubuntu-2404
-        timeout-minutes: 20
-        steps:
-            - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-
-            - uses: rustsec/audit-check@69366f33c96575abad1ee0dba8212993eecbe998 # v2.0.0
-              with:
-                  token: ${{ secrets.GITHUB_TOKEN }}
-
-    deny:
-        name: License & Supply Chain
-        runs-on: blacksmith-2vcpu-ubuntu-2404
-        timeout-minutes: 20
-        steps:
-            - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-
-            - uses: EmbarkStudios/cargo-deny-action@3fd3802e88374d3fe9159b834c7714ec57d6c979 # v2
-              with:
-                  command: check advisories licenses sources